✨ Add a drop-in version of the stylesheet that works without class names.

[hayleigh-dot-dev]

Certain kinds of users and applications will benefit from the ability to drop lustre_ui's stylesheet onto a webpage and get nice styled elements straight from their semantic HTML. It'd be great if we could support this functionality: it could be particularly well-suited to the --include-styles flag of the lustre/try preview server.

Folks using that server will not be writing serious apps, and will likely care little or not-at-all about styling. Letting them experience something that looks nice out of the box would be a great DX boost.