Turns out auto-closing words was a bad idea. win**do**w, **struct**ure,
**sig**n and so on
They don't serve any purpose in `config.toml` nor `brackets.scm` at this
point, so I removed them>
Release Notes:
- N/A
This PR removes the unused crates for plugin support.
We're currently exploring Wasm-based extensions, and it's unlikely that
we'll be reusing any of this existing work.
Release Notes:
- N/A
- 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
