React components from scratch WIP

I have recently been recreating react components that follow ARIA guidelines, have sexy animations, and are super extensible. This is the consolidated home for that work into the near future.

Components I have created so far:

1. Slider ↗
2. Vercel's Tab component ↗
3. Disclosure ↗
4. Toggle Group ↗
5. Treeview ↗
6. Sidebar ↗

Utils created so far:

1. Roving tabindex ↗