chore: Extract languages from zed crate (#8270)

- Moves languages module from `zed` into a separate crate. That way we
have less of a long pole at the end of compilation.
- Removes moot dependencies on editor/picker. This is totally harmless
and might help in the future if we decide to decouple picker from
editor.

Before:
```
Number of crates that depend on 'picker' but not on 'editor': 1
Total number of crates that depend on 'picker': 13
Total number of crates that depend on 'editor': 30
```
After:
```
Number of crates that depend on 'picker' but not on 'editor': 5
Total number of crates that depend on 'picker': 12
Total number of crates that depend on 'editor': 26
```
The more crates depend on just picker but not editor, the better in that
case.

Release Notes:

- N/A

typos.toml

@@ -4,7 +4,7 @@ ignore-hidden = false
 extend-exclude = [
     ".git/",
     # glsl isn't recognized by this tool
-    "crates/zed/src/languages/glsl/",
+    "crates/languages/src/glsl/",
     # File suffixes aren't typos
     "assets/icons/file_icons/file_types.json",
     # Not our typos