[[PR Description]]

Refine the `Keybinding` component.

Still some issues:

![CleanShot 2023-11-28 at 15 15
38@2x](https://github.com/zed-industries/zed/assets/1714999/4fc1dde4-fe65-4e1d-acf5-6faefa12f053)

Lots of things moving so want to get this in.

Changes:

- use icons for some keys & modifiers
- updates some icons
- updates some state colors

Release Notes:

- N/A

Zed 2 Release Notes:

- Keybindings now use icons for common keys and modifiers