Initially intended as a part-fix for #3134 to enable child themes to swap typefaces that get included more easily, this also extends that change across to many themes using the common patterns.
It explicitly does not change the following themes:
Spearhead (uses different endpoint and method)
And the following themes that have multiple functions that generate typeface includes so as to avoid confusion:
* canard
* gazette
* illustratr
* publication
This PR should remove all Headstart Annotations from themes in this repo.
Why? Headstart annotations stored in WP.com themes are generated, tested, and sent for translation via WP-CLI scripts running on subversion-ed WordPress sandboxes. I recently updated Headstart annotations for our 20+ recent themes in order to correct some issues in our FSE Plugin and Page Layout feature. When discussing how to get these annotations updated in this themes repo @michaeldcain and came up with two options.
1. Copy-paste back into the affected themes in this repo.
2. Just remove all the Headstart annotations from this repo.
The second option seemed the simplest. It leaves **all** Headstart annotations on WP.com "ignore-able" for this GH repo and reduces the chance of Headstart annotations becoming out of date in this GH repo, potentially reducing future errors.
* Update selectors for button blocks, for better custom colour fallbacks.
* Update drop cap size, to scale when font size does.
* Add visited states to custom colours.
* Position bullets inside of lists when widget blocks are centred.
* Reorganize styles a bit, consolidate header styles, and delete empty selectors
* Update editor colour palette to match theme's colours
* Remove styles for pre and code blocks in editor; doesn't look identical to the front-end but they blocked the text from being edited
