Change theme to match `flake.parts`

[srid]

@roberth Could you confirm that this is what you want community.flake.parts to look like?

[srid]

And is this a builtin theme of mdbook? Where is it defined, btw?

[roberth]

Yes, it is a good example for a documentation theme, because it is a calm, flat style that doesn't distract from the content. Also, a very similar style makes the two sites look more coherent.

It is mostly the default "light" theme, with a few overrides: https://github.com/hercules-ci/flake.parts-website/blob/main/site/flake-parts.css

The rest of the theme is as defined upstream by mdBook here.

[srid]

@roberth How do you find the Obsidian theme in comparison? https://publish.obsidian.md/tasks/Scripting/Custom+Sorting

Let's still do mdBook theme for consistency with flake.parts site, but am just curious.

[roberth]

The Obsidian theme has a couple of flaws, but the general looks is ok.

• Saturated green text ("Released") on pastel green background: ugly and might be insufficient contrast (guessing; I'm no color vision expert)
• Note background are label background are also dissonant.
• Something's jarring about those colors in dark mode too. Maybe because the label background intensity matches the "Released" text color instead of its background.
• Drop shadows look dated
• Corner rounding is inconsistent
• Their link color looks like the old color for already-visited links, but I suppose we'd use the flake-parts logo color anyway. At least that's what I did on flake.parts. (but only in the menu? - might want to apply that more broadly, but maybe not as bright? needs testing)