Add creation date to all pages

[jdbaldry]

By convention, the Hugo date front matter usually represents creation date: https://gohugo.io/content-management/front-matter/#date.

Having this date lets me configure an RSS feed for Writers' Toolkit that readers can subscribe to and receive updates for new pages.

Signed-off-by: Jack Baldry jack.baldry@grafana.com

[github-actions[bot]]

Readability report

File	AutomatedReadability	ColemanLiau	FleschKincaid	FleschReadingEase	GunningFog	LIX	SMOG
docs/sources/_index.md	$${9.83\space\color{black}(Δ+0.00)}$$	$${11.46\space\color{black}(Δ+0.00)}$$	$${9.18\space\color{black}(Δ+0.00)}$$	$${57.49\space\color{black}(Δ+0.00)}$$	$${11.07\space\color{black}(Δ+0.00)}$$	$${45.01\space\color{black}(Δ+0.00)}$$	$${10.95\space\color{black}(Δ+0.00)}$$
docs/sources/contribute/_index.md	$${7.56\space\color{black}(Δ+0.00)}$$	$${10.37\space\color{black}(Δ+0.00)}$$	$${8.47\space\color{black}(Δ+0.00)}$$	$${56.00\space\color{black}(Δ+0.00)}$$	$${9.60\space\color{black}(Δ+0.00)}$$	$${38.59\space\color{black}(Δ+0.00)}$$	$${10.47\space\color{black}(Δ+0.00)}$$
docs/sources/contribute/release-notes/index.md	$${8.30\space\color{black}(Δ+0.00)}$$	$${9.37\space\color{black}(Δ+0.00)}$$	$${8.78\space\color{black}(Δ+0.00)}$$	$${60.98\space\color{black}(Δ+0.00)}$$	$${10.60\space\color{black}(Δ+0.00)}$$	$${37.78\space\color{black}(Δ+0.00)}$$	$${11.34\space\color{black}(Δ+0.00)}$$
docs/sources/get-started/_index.md	$${7.10\space\color{black}(Δ+0.00)}$$	$${11.06\space\color{black}(Δ+0.00)}$$	$${7.91\space\color{black}(Δ+0.00)}$$	$${53.23\space\color{black}(Δ+0.00)}$$	$${9.73\space\color{black}(Δ+0.00)}$$	$${37.34\space\color{black}(Δ+0.00)}$$	$${9.99\space\color{black}(Δ+0.00)}$$
docs/sources/introduction/index.md	$${8.99\space\color{black}(Δ+0.00)}$$	$${13.34\space\color{black}(Δ+0.00)}$$	$${9.96\space\color{black}(Δ+0.00)}$$	$${39.19\space\color{black}(Δ+0.00)}$$	$${11.68\space\color{black}(Δ+0.00)}$$	$${45.60\space\color{black}(Δ+0.00)}$$	$${11.35\space\color{black}(Δ+0.00)}$$
docs/sources/review/_index.md	$${5.24\space\color{black}(Δ+0.00)}$$	$${8.80\space\color{black}(Δ+0.00)}$$	$${4.49\space\color{black}(Δ+0.00)}$$	$${77.10\space\color{black}(Δ+0.00)}$$	$${4.45\space\color{black}(Δ+0.00)}$$	$${26.75\space\color{black}(Δ+0.00)}$$	$${5.99\space\color{black}(Δ+0.00)}$$
docs/sources/review/backport-changes/index.md	$${11.86\space\color{black}(Δ+0.00)}$$	$${10.90\space\color{black}(Δ+0.00)}$$	$${11.66\space\color{black}(Δ+0.00)}$$	$${49.98\space\color{black}(Δ+0.00)}$$	$${13.23\space\color{black}(Δ+0.00)}$$	$${51.35\space\color{black}(Δ+0.00)}$$	$${13.26\space\color{black}(Δ+0.00)}$$
docs/sources/review/cla-assistant/index.md	$${8.16\space\color{black}(Δ+0.00)}$$	$${10.72\space\color{black}(Δ+0.00)}$$	$${8.85\space\color{black}(Δ+0.00)}$$	$${54.87\space\color{black}(Δ+0.00)}$$	$${10.99\space\color{black}(Δ+0.00)}$$	$${41.44\space\color{black}(Δ+0.00)}$$	$${11.67\space\color{black}(Δ+0.00)}$$
docs/sources/review/doc-validator/_index.md	$${8.40\space\color{black}(Δ+0.00)}$$	$${11.54\space\color{black}(Δ+0.00)}$$	$${9.83\space\color{black}(Δ+0.00)}$$	$${45.73\space\color{black}(Δ+0.00)}$$	$${11.34\space\color{black}(Δ+0.00)}$$	$${46.30\space\color{black}(Δ+0.00)}$$	$${11.96\space\color{black}(Δ+0.00)}$$
docs/sources/review/doc-validator/errata.md	$${4.01\space\color{black}(Δ+0.00)}$$	$${7.35\space\color{black}(Δ+0.00)}$$	$${6.77\space\color{black}(Δ+0.00)}$$	$${59.31\space\color{black}(Δ+0.00)}$$	$${8.84\space\color{black}(Δ+0.00)}$$	$${30.69\space\color{black}(Δ+0.00)}$$	$${9.21\space\color{black}(Δ+0.00)}$$
docs/sources/review/lint-prose/_index.md	$${5.62\space\color{black}(Δ+0.00)}$$	$${8.81\space\color{black}(Δ+0.00)}$$	$${7.04\space\color{black}(Δ+0.00)}$$	$${62.11\space\color{black}(Δ+0.00)}$$	$${9.60\space\color{black}(Δ+0.00)}$$	$${31.42\space\color{black}(Δ+0.00)}$$	$${10.29\space\color{black}(Δ+0.00)}$$
docs/sources/review/lint-prose/dictionary/_index.md	$${6.94\space\color{black}(Δ+0.00)}$$	$${10.18\space\color{black}(Δ+0.00)}$$	$${8.93\space\color{black}(Δ+0.00)}$$	$${50.04\space\color{black}(Δ+0.00)}$$	$${10.36\space\color{black}(Δ+0.00)}$$	$${40.51\space\color{black}(Δ+0.00)}$$	$${11.21\space\color{black}(Δ+0.00)}$$
docs/sources/review/lint-prose/dictionary/add-words.md	$${5.63\space\color{black}(Δ+0.00)}$$	$${9.23\space\color{black}(Δ+0.00)}$$	$${6.52\space\color{black}(Δ+0.00)}$$	$${63.14\space\color{black}(Δ+0.00)}$$	$${7.93\space\color{black}(Δ+0.00)}$$	$${35.10\space\color{black}(Δ+0.00)}$$	$${9.73\space\color{black}(Δ+0.00)}$$
docs/sources/review/test-documentation-changes/index.md	$${7.01\space\color{black}(Δ+0.00)}$$	$${10.27\space\color{black}(Δ+0.00)}$$	$${8.61\space\color{black}(Δ+0.00)}$$	$${52.35\space\color{black}(Δ+0.00)}$$	$${10.56\space\color{black}(Δ+0.00)}$$	$${40.89\space\color{black}(Δ+0.00)}$$	$${11.21\space\color{black}(Δ+0.00)}$$
docs/sources/shared/hugo-error-example-bad-link.md	$${8.97\space\color{black}(Δ+0.00)}$$	$${12.05\space\color{black}(Δ+0.00)}$$	$${10.48\space\color{black}(Δ+0.00)}$$	$${41.88\space\color{black}(Δ+0.00)}$$	$${14.66\space\color{black}(Δ+0.00)}$$	$${43.86\space\color{black}(Δ+0.00)}$$	$${13.90\space\color{black}(Δ+0.00)}$$
docs/sources/shared/make-help.md	$${8.45\space\color{black}(Δ+0.00)}$$	$${11.60\space\color{black}(Δ+0.00)}$$	$${11.07\space\color{black}(Δ+0.00)}$$	$${36.81\space\color{black}(Δ+0.00)}$$	$${12.94\space\color{black}(Δ+0.00)}$$	$${43.18\space\color{black}(Δ+0.00)}$$	$${13.02\space\color{black}(Δ+0.00)}$$
docs/sources/shared/refs-example.md	$${7.67\space\color{black}(Δ+0.00)}$$	$${10.41\space\color{black}(Δ+0.00)}$$	$${8.37\space\color{black}(Δ+0.00)}$$	$${57.12\space\color{black}(Δ+0.00)}$$	$${9.15\space\color{black}(Δ+0.00)}$$	$${39.82\space\color{black}(Δ+0.00)}$$	$${11.21\space\color{black}(Δ+0.00)}$$
docs/sources/structure/_index.md	$${7.95\space\color{black}(Δ+0.00)}$$	$${10.32\space\color{black}(Δ+0.00)}$$	$${8.88\space\color{black}(Δ+0.00)}$$	$${55.18\space\color{black}(Δ+0.00)}$$	$${10.30\space\color{black}(Δ+0.00)}$$	$${36.82\space\color{black}(Δ+0.00)}$$	$${10.87\space\color{black}(Δ+0.00)}$$
docs/sources/structure/about-documentation-design/index.md	$${10.24\space\color{black}(Δ+0.00)}$$	$${13.83\space\color{black}(Δ+0.00)}$$	$${11.49\space\color{black}(Δ+0.00)}$$	$${33.87\space\color{black}(Δ+0.00)}$$	$${12.05\space\color{black}(Δ+0.00)}$$	$${43.66\space\color{black}(Δ+0.00)}$$	$${12.26\space\color{black}(Δ+0.00)}$$
docs/sources/structure/topic-types/_index.md	$${8.34\space\color{black}(Δ+0.00)}$$	$${11.41\space\color{black}(Δ+0.00)}$$	$${8.12\space\color{black}(Δ+0.00)}$$	$${58.19\space\color{black}(Δ+0.00)}$$	$${9.32\space\color{black}(Δ+0.00)}$$	$${41.76\space\color{black}(Δ+0.00)}$$	$${10.29\space\color{black}(Δ+0.00)}$$
docs/sources/structure/topic-types/concept/index.md	$${7.26\space\color{black}(Δ+0.00)}$$	$${11.15\space\color{black}(Δ+0.00)}$$	$${7.85\space\color{black}(Δ+0.00)}$$	$${54.57\space\color{black}(Δ+0.00)}$$	$${8.58\space\color{black}(Δ+0.00)}$$	$${41.12\space\color{black}(Δ+0.00)}$$	$${9.89\space\color{black}(Δ+0.00)}$$
docs/sources/structure/topic-types/reference/index.md	$${7.76\space\color{black}(Δ+0.00)}$$	$${11.47\space\color{black}(Δ+0.00)}$$	$${9.06\space\color{black}(Δ+0.00)}$$	$${47.68\space\color{black}(Δ+0.00)}$$	$${11.27\space\color{black}(Δ+0.00)}$$	$${38.68\space\color{black}(Δ+0.00)}$$	$${11.44\space\color{black}(Δ+0.00)}$$
docs/sources/structure/topic-types/task/index.md	$${7.97\space\color{black}(Δ+0.00)}$$	$${10.71\space\color{black}(Δ+0.00)}$$	$${8.33\space\color{black}(Δ+0.00)}$$	$${57.71\space\color{black}(Δ+0.00)}$$	$${9.27\space\color{black}(Δ+0.00)}$$	$${37.19\space\color{black}(Δ+0.00)}$$	$${10.63\space\color{black}(Δ+0.00)}$$
docs/sources/structure/topic-types/tutorial/index.md	$${7.99\space\color{black}(Δ+0.00)}$$	$${10.41\space\color{black}(Δ+0.00)}$$	$${9.55\space\color{black}(Δ+0.00)}$$	$${50.26\space\color{black}(Δ+0.00)}$$	$${11.63\space\color{black}(Δ+0.00)}$$	$${41.63\space\color{black}(Δ+0.00)}$$	$${11.95\space\color{black}(Δ+0.00)}$$
docs/sources/structure/topic-types/visualization/index.md	$${7.30\space\color{black}(Δ+0.00)}$$	$${10.94\space\color{black}(Δ+0.00)}$$	$${9.72\space\color{black}(Δ+0.00)}$$	$${42.78\space\color{black}(Δ+0.00)}$$	$${9.90\space\color{black}(Δ+0.00)}$$	$${38.19\space\color{black}(Δ+0.00)}$$	$${10.74\space\color{black}(Δ+0.00)}$$
docs/sources/write/_index.md	$${10.10\space\color{black}(Δ+0.00)}$$	$${13.22\space\color{black}(Δ+0.00)}$$	$${10.30\space\color{black}(Δ+0.00)}$$	$${44.22\space\color{black}(Δ+0.00)}$$	$${10.43\space\color{black}(Δ+0.00)}$$	$${48.56\space\color{black}(Δ+0.00)}$$	$${12.16\space\color{black}(Δ+0.00)}$$
docs/sources/write/deprecate-remove/index.md	$${9.50\space\color{black}(Δ+0.00)}$$	$${11.82\space\color{black}(Δ+0.00)}$$	$${10.57\space\color{black}(Δ+0.00)}$$	$${44.71\space\color{black}(Δ+0.00)}$$	$${12.25\space\color{black}(Δ+0.00)}$$	$${45.88\space\color{black}(Δ+0.00)}$$	$${12.55\space\color{black}(Δ+0.00)}$$
docs/sources/write/front-matter/index.md	$${6.85\space\color{black}(Δ+0.00)}$$	$${9.28\space\color{black}(Δ+0.00)}$$	$${8.00\space\color{black}(Δ+0.00)}$$	$${60.22\space\color{black}(Δ+0.00)}$$	$${10.07\space\color{black}(Δ+0.00)}$$	$${36.78\space\color{black}(Δ+0.00)}$$	$${11.08\space\color{black}(Δ+0.00)}$$
docs/sources/write/image-guidelines/index.md	$${7.44\space\color{black}(Δ+0.00)}$$	$${10.89\space\color{black}(Δ+0.00)}$$	$${8.59\space\color{black}(Δ+0.00)}$$	$${52.06\space\color{black}(Δ+0.00)}$$	$${10.78\space\color{black}(Δ+0.00)}$$	$${37.88\space\color{black}(Δ+0.00)}$$	$${11.18\space\color{black}(Δ+0.00)}$$
docs/sources/write/links/_index.md	$${5.47\space\color{black}(Δ+0.00)}$$	$${8.80\space\color{black}(Δ+0.00)}$$	$${6.80\space\color{black}(Δ+0.00)}$$	$${62.87\space\color{black}(Δ+0.00)}$$	$${8.62\space\color{black}(Δ+0.00)}$$	$${33.27\space\color{black}(Δ+0.00)}$$	$${9.85\space\color{black}(Δ+0.00)}$$
docs/sources/write/links/useful-link-text.md	$${5.36\space\color{black}(Δ+0.00)}$$	$${7.51\space\color{black}(Δ+0.00)}$$	$${6.31\space\color{black}(Δ+0.00)}$$	$${71.95\space\color{black}(Δ+0.00)}$$	$${9.32\space\color{black}(Δ+0.00)}$$	$${32.32\space\color{black}(Δ+0.00)}$$	$${10.19\space\color{black}(Δ+0.00)}$$
docs/sources/write/markdown-guide/index.md	$${6.78\space\color{black}(Δ+0.00)}$$	$${10.37\space\color{black}(Δ+0.00)}$$	$${7.28\space\color{black}(Δ+0.00)}$$	$${59.89\space\color{black}(Δ+0.00)}$$	$${8.69\space\color{black}(Δ+0.00)}$$	$${35.85\space\color{black}(Δ+0.00)}$$	$${10.13\space\color{black}(Δ+0.00)}$$
docs/sources/write/reuse-content/_index.md	$${7.91\space\color{black}(Δ+0.00)}$$	$${11.20\space\color{black}(Δ+0.00)}$$	$${7.76\space\color{black}(Δ+0.00)}$$	$${59.38\space\color{black}(Δ+0.00)}$$	$${9.31\space\color{black}(Δ+0.00)}$$	$${41.38\space\color{black}(Δ+0.00)}$$	$${10.34\space\color{black}(Δ+0.00)}$$
docs/sources/write/reuse-content/reuse-directories/index.md	$${6.86\space\color{black}(Δ+0.00)}$$	$${10.14\space\color{black}(Δ+0.00)}$$	$${9.02\space\color{black}(Δ+0.00)}$$	$${49.15\space\color{black}(Δ+0.00)}$$	$${11.81\space\color{black}(Δ+0.00)}$$	$${35.62\space\color{black}(Δ+0.00)}$$	$${11.68\space\color{black}(Δ+0.00)}$$
docs/sources/write/reuse-content/reuse-shared-content/index.md	$${9.08\space\color{black}(Δ+0.00)}$$	$${11.11\space\color{black}(Δ+0.00)}$$	$${8.88\space\color{black}(Δ+0.00)}$$	$${57.52\space\color{black}(Δ+0.00)}$$	$${9.86\space\color{black}(Δ+0.00)}$$	$${44.85\space\color{black}(Δ+0.00)}$$	$${10.99\space\color{black}(Δ+0.00)}$$
docs/sources/write/shortcodes/index.md	$${7.30\space\color{black}(Δ+0.00)}$$	$${10.36\space\color{black}(Δ+0.00)}$$	$${8.15\space\color{black}(Δ+0.00)}$$	$${56.90\space\color{black}(Δ+0.00)}$$	$${9.67\space\color{black}(Δ+0.00)}$$	$${39.34\space\color{black}(Δ+0.00)}$$	$${10.96\space\color{black}(Δ+0.00)}$$
docs/sources/write/style-guide/_index.md	$${8.82\space\color{black}(Δ+0.00)}$$	$${12.09\space\color{black}(Δ+0.00)}$$	$${8.61\space\color{black}(Δ+0.00)}$$	$${54.34\space\color{black}(Δ+0.00)}$$	$${8.11\space\color{black}(Δ+0.00)}$$	$${42.31\space\color{black}(Δ+0.00)}$$	$${11.60\space\color{black}(Δ+0.00)}$$
docs/sources/write/style-guide/capitalization-punctuation/index.md	$${8.73\space\color{black}(Δ+0.00)}$$	$${11.93\space\color{black}(Δ+0.00)}$$	$${9.27\space\color{black}(Δ+0.00)}$$	$${49.84\space\color{black}(Δ+0.00)}$$	$${10.64\space\color{black}(Δ+0.00)}$$	$${41.27\space\color{black}(Δ+0.00)}$$	$${12.03\space\color{black}(Δ+0.00)}$$
docs/sources/write/style-guide/inclusive-writing/index.md	$${6.28\space\color{black}(Δ+0.00)}$$	$${9.57\space\color{black}(Δ+0.00)}$$	$${7.67\space\color{black}(Δ+0.00)}$$	$${58.02\space\color{black}(Δ+0.00)}$$	$${9.98\space\color{black}(Δ+0.00)}$$	$${37.36\space\color{black}(Δ+0.00)}$$	$${10.76\space\color{black}(Δ+0.00)}$$
docs/sources/write/style-guide/style-conventions/index.md	$${7.47\space\color{black}(Δ+0.00)}$$	$${10.43\space\color{black}(Δ+0.00)}$$	$${8.29\space\color{black}(Δ+0.00)}$$	$${56.55\space\color{black}(Δ+0.00)}$$	$${10.23\space\color{black}(Δ+0.00)}$$	$${38.86\space\color{black}(Δ+0.00)}$$	$${11.19\space\color{black}(Δ+0.00)}$$
docs/sources/write/style-guide/ui-elements/index.md	$${4.34\space\color{black}(Δ+0.00)}$$	$${6.81\space\color{black}(Δ+0.00)}$$	$${6.22\space\color{black}(Δ+0.00)}$$	$${70.05\space\color{black}(Δ+0.00)}$$	$${6.82\space\color{black}(Δ+0.00)}$$	$${26.15\space\color{black}(Δ+0.00)}$$	$${8.84\space\color{black}(Δ+0.00)}$$
docs/sources/write/style-guide/ux-writing/index.md	$${5.76\space\color{black}(Δ+0.00)}$$	$${9.25\space\color{black}(Δ+0.00)}$$	$${6.65\space\color{black}(Δ+0.00)}$$	$${63.38\space\color{black}(Δ+0.00)}$$	$${8.37\space\color{black}(Δ+0.00)}$$	$${33.65\space\color{black}(Δ+0.00)}$$	$${9.58\space\color{black}(Δ+0.00)}$$
docs/sources/write/style-guide/voice-tone-guidelines/index.md	$${8.27\space\color{black}(Δ+0.00)}$$	$${10.89\space\color{black}(Δ+0.00)}$$	$${8.63\space\color{black}(Δ+0.00)}$$	$${56.36\space\color{black}(Δ+0.00)}$$	$${10.77\space\color{black}(Δ+0.00)}$$	$${39.01\space\color{black}(Δ+0.00)}$$	$${11.86\space\color{black}(Δ+0.00)}$$
docs/sources/write/style-guide/word-list/index.md	$${6.26\space\color{black}(Δ+0.00)}$$	$${9.27\space\color{black}(Δ+0.00)}$$	$${7.26\space\color{black}(Δ+0.00)}$$	$${62.32\space\color{black}(Δ+0.00)}$$	$${9.16\space\color{black}(Δ+0.00)}$$	$${33.25\space\color{black}(Δ+0.00)}$$	$${10.52\space\color{black}(Δ+0.00)}$$
docs/sources/write/style-guide/write-for-developers/index.md	$${8.35\space\color{black}(Δ+0.00)}$$	$${11.52\space\color{black}(Δ+0.00)}$$	$${9.24\space\color{black}(Δ+0.00)}$$	$${49.76\space\color{black}(Δ+0.00)}$$	$${10.74\space\color{black}(Δ+0.00)}$$	$${42.79\space\color{black}(Δ+0.00)}$$	$${11.85\space\color{black}(Δ+0.00)}$$
docs/sources/write/tooling-and-workflows/index.md	$${7.53\space\color{black}(Δ+0.00)}$$	$${9.95\space\color{black}(Δ+0.00)}$$	$${8.36\space\color{black}(Δ+0.00)}$$	$${58.34\space\color{black}(Δ+0.00)}$$	$${9.37\space\color{black}(Δ+0.00)}$$	$${35.61\space\color{black}(Δ+0.00)}$$	$${10.58\space\color{black}(Δ+0.00)}$$

View metric targets

| Metric | Range | Ideal score | | --- | --- | --- | | [AutomatedReadability](https://en.wikipedia.org/wiki/Automated_readability_index) | 6 (very easy read) to 14 (extremely difficult read) | 8 or less | | [ColemanLiau](https://en.wikipedia.org/wiki/Coleman%E2%80%93Liau_index) | 6 (very easy read) to 17 (extremely difficult read) | 9 or less | | [FleschKincaid](https://en.wikipedia.org/wiki/Flesch%E2%80%93Kincaid_readability_tests) | 6 (very easy read) to 17 (extremely difficult read) | 8 or less | | [FleschReadingEase](https://en.wikipedia.org/wiki/Flesch%E2%80%93Kincaid_readability_tests) | 100 (very easy read) to 0 (extremely difficult read) | 70 or more | | [GunningFog](https://en.wikipedia.org/wiki/Gunning_fog_index) | 6 (very easy read) to 17 (extremely difficult read) | 10 or less | | [LIX](https://en.wikipedia.org/wiki/Lix_(readability_test)) | 20 (very easy read) to 60+ (extremely difficult read) | 35 or less | | [SMOG](https://en.wikipedia.org/wiki/SMOG) | 6 (very easy read) to 17 (extremely difficult read) | 10 or less |

[jdbaldry]

I just did a spot check but found this file has no review date when it's definitely been updated recently: docs/sources/write/style-guide/word-list/index.md

I don't think it's been formally reviewed since I introduced the review process for this repo: https://github.com/grafana/writers-toolkit/blame/63c5c56fd969f9b8b8cd787c9f5352959f77b468/docs/sources/write/style-guide/word-list/index.md shows nothing and neither does https://github.com/grafana/writers-toolkit/issues?q=is%3Aissue+word-list+is%3Aclosed

[imatwawana]

I just did a spot check but found this file has no review date when it's definitely been updated recently: docs/sources/write/style-guide/word-list/index.md

I don't think it's been formally reviewed since I introduced the review process for this repo: 63c5c56/docs/sources/write/style-guide/word-list/index.md (blame) shows nothing and neither does grafana/writers-toolkit/issues (word-list is:closed)

I guess that's not a blocker for this PR though?

[jdbaldry]

This PR adds the creation date to all pages which is a bit different to the review date. I'll confirm everything is getting into the review cycle separately I think.