v6: Cleanup utilities (#41818)

v6: Cleanup utilities (#41818)

* Split font utilities, update API to do more pseudo classes, drop display type classes

* Improve display docs, remove print display utils

* Document gap and grid utils, rename a couple classes

* better url

* Fix color-mix

* Undo utilities API change for now

* fix api changes

* Bundlewatch

* Linter cleanup

* Massive utilities update

- Split several utilities across smaller pages
- New underline thickness utility
- Updated text-wrap utility to use `text-wrap` property, removes white-space utils
- Adds a dozen new width utilities for now—TBD if we keep this, they're not documented yet
- Redoes the color utilities—color, background color, border color, link color—to use color-mix without attribute selectors. Faster, simpler, better support for overriding other components.
- Redesigns margin, padding, gap utils pages—shoutout Tailwind for having a better visualization here. Cribbed their approach to emphasize spacing utilities.
- Fixed up a lot of usages of color utilities, likely more to do
- Fixed up a lot of broken links, probably also more to do

* New details component, simpler a11y color contrast warning, updated docs bottom nav, updated ref tables

* Avoid name collision, update to demo thickness hover

* Rename $new-font-sizes to $font-sizes

* Update width and height docs

* Few cleanup tweaks

* Remove unused attribute selector for borders

* Fixes

* more bundle

* fixes

* spelling

* add json