Workspace persistence for SSH projects (#17996)

TODOs:

- [x] Add tests to `workspace/src/persistence.rs`
- [x] Add a icon for ssh projects
- [x] Fix all `TODO` comments
- [x] Use `port` if it's passed in the ssh connection options

In next PRs:
- Make sure unsaved buffers are persisted/restored, along with other
items/layout
- Handle multiple paths/worktrees correctly


Release Notes:

- N/A

---------

Co-authored-by: Bennet Bo Fenner <bennet@zed.dev>

crates/zed/src/main.rs

@@ -667,7 +667,11 @@ fn handle_open_request(
         cx.spawn(|mut cx| async move {
             open_ssh_project(
                 connection_info,
-                request.open_paths,
+                request
+                    .open_paths
+                    .into_iter()
+                    .map(|path| path.path)
+                    .collect::<Vec<_>>(),
                 app_state,
                 workspace::OpenOptions::default(),
                 &mut cx,