Add initial support for WSL (#37035)

Closes #36188

## Todo

* [x] CLI
* [x] terminals
* [x] tasks

## For future PRs
* debugging
* UI for opening WSL projects
* fixing workspace state restoration

Release Notes:

- Windows alpha: Zed now supports editing folders in WSL.

---------

Co-authored-by: Junkui Zhang <364772080@qq.com>

crates/paths/src/paths.rs

@@ -33,6 +33,11 @@ pub fn remote_server_dir_relative() -> &'static Path {
     Path::new(".zed_server")
 }
 
+/// Returns the relative path to the zed_wsl_server directory on the wsl host.
+pub fn remote_wsl_server_dir_relative() -> &'static Path {
+    Path::new(".zed_wsl_server")
+}
+
 /// Sets a custom directory for all user data, overriding the default data directory.
 /// This function must be called before any other path operations that depend on the data directory.
 /// The directory's path will be canonicalized to an absolute path by a blocking FS operation.