Rework extension filtering to use a `ToggleButton` (#8387)

This PR reworks the extension filtering to use a `ToggleButton`, since
the filter states are mutually-exclusive.

<img width="1136" alt="Screenshot 2024-02-25 at 10 04 59 AM"
src="https://github.com/zed-industries/zed/assets/1486634/52c621da-201c-42b9-805d-62e3ab66f94b">

Release Notes:

- N/A