Add `rebuildDocs` helper script

[Blacksmoke16]

Context

Make it easier to trigger re-builds of the API docs. Also removes the need to remember to manually trigger one after tagging component(s).

Test build: https://github.com/athena-framework/athena/actions/runs/9025245937

Changelog

• Add script to trigger a rebuild of the Athena docs
• Call it after tagging components