Implement custom scrollbars

[neatonk]

The scrollbars styles have been implemented, but they are not interactive yet.

TODO:

• use framer motion to update scrollbars to reflect actual scroll position.
• hide OS scrollbars? This could be bad for accessibility and may not be necessary.
• implement rio style interaction where left click and right click on the scrollbar scrolls up/down a half page.

[neatonk]

RadixUI/shadcn might have a good solution for this. The Scroll Area component provides custom scroll bars with accessibility and is built on RadixUI. Assuming they can be fully customized.

Also see rac.fm for some sick scrollbars.