v6: Docs design updates (#42250)

* Start docs redesign, new page metadata fields

* wip

* more

* Update offcanvas references to drawer after rebase

Carry over frontmatter additions to drawer.mdx,
fix DocsLayout ToC to use drawer classes and dialog element,
update navbar.mdx dep title, and fix _toc.scss class name.

Made-with: Cursor

* woooooo

* fixes

* update metadata and more

* more improvements

* Some component updates, docs updates

* update

* add a bundlewatch script, fix bundlewatch

* bump

* fix

* dist

* Remove gradients for now

* Update format

* more wip