Allow clients to run Zed tasks on remote projects (#12199)

Release Notes:

- Enabled Zed tasks on remote projects with ssh connection string
specified

---------

Co-authored-by: Conrad Irwin <conrad@zed.dev>

crates/collab/src/rpc.rs

@@ -446,6 +446,12 @@ impl Server {
             .add_message_handler(update_language_server)
             .add_message_handler(update_diagnostic_summary)
             .add_message_handler(update_worktree_settings)
+            .add_request_handler(user_handler(
+                forward_project_request_for_owner::<proto::TaskContextForLocation>,
+            ))
+            .add_request_handler(user_handler(
+                forward_project_request_for_owner::<proto::TaskTemplates>,
+            ))
             .add_request_handler(user_handler(
                 forward_read_only_project_request::<proto::GetHover>,
             ))
@@ -2889,6 +2895,31 @@ where
     Ok(())
 }
 
+/// forward a project request to the dev server. Only allowed
+/// if it's your dev server.
+async fn forward_project_request_for_owner<T>(
+    request: T,
+    response: Response<T>,
+    session: UserSession,
+) -> Result<()>
+where
+    T: EntityMessage + RequestMessage,
+{
+    let project_id = ProjectId::from_proto(request.remote_entity_id());
+
+    let host_connection_id = session
+        .db()
+        .await
+        .host_for_owner_project_request(project_id, session.connection_id, session.user_id())
+        .await?;
+    let payload = session
+        .peer
+        .forward_request(session.connection_id, host_connection_id, request)
+        .await?;
+    response.send(payload)?;
+    Ok(())
+}
+
 /// forward a project request to the host. These requests are disallowed
 /// for guests.
 async fn forward_mutating_project_request<T>(