Style headings
Style sidebar
Re-order API versions
Rename flavor_data to settings
Style index page
Remove deprecated source

Delete deprecated layouts

Delete deprecated stylesheets

Delete deprecated JavaScripts

Delete unused images
Reorganize assets
Add helpers for Page titles
Frontmatter based page titles
[wip] Breadcrumbs
Localize footer texts
Style lists
Format APIv3 content
Rethink toggle button for code example blocks