Add language icons to the language selector (#21298)

Closes https://github.com/zed-industries/zed/issues/21290

This is a first attempt to show the language icons to the selector.
Ideally, I wouldn't like to have yet another place mapping extensions to
icons, as we already have the `file_types.json` file doing that, but I'm
not so sure how to pull from it yet. Maybe in a future pass we'll
improve this and make it more solid.

<img width="700" alt="Screenshot 2024-11-28 at 16 10 27"
src="https://github.com/user-attachments/assets/683c3bef-5389-470f-a41e-3d510b927b61">

Release Notes:

- N/A

---------

Co-authored-by: Kirill Bulatov <kirill@zed.dev>
Co-authored-by: Piotr Osiewicz <24362066+osiewicz@users.noreply.github.com>

crates/language_selector/Cargo.toml

@@ -15,11 +15,14 @@ doctest = false
 [dependencies]
 anyhow.workspace = true
 editor.workspace = true
+file_finder.workspace = true
+file_icons.workspace = true
 fuzzy.workspace = true
 gpui.workspace = true
 language.workspace = true
 picker.workspace = true
 project.workspace = true
+settings.workspace = true
 ui.workspace = true
 util.workspace = true
 workspace.workspace = true