This PR reorganizes the components in the `ui2` crate.
The distinction between "elements" and "components" is now gone, with
all of the reusable components living under `components/`.
The components that we built while prototyping but will eventually live
in other crates currently reside in the `to_extract/` module.
Release Notes:
- N/A
Don't pass a render function separately from the view.
Co-authored-by: Nathan Sobo <nathan@zed.dev>
Co-authored-by: Mikayla <mikayla@zed.dev>
Co-authored-by: Antonio <as-cii@zed.dev>
