WIP: remoting (#10085)

Release Notes:

- Added private alpha support for remote development. Please reach out to hi@zed.dev if you'd like to be part of shaping this feature.

crates/collab/migrations/20240402155003_add_dev_server_projects.sql

@@ -0,0 +1,9 @@
+CREATE TABLE remote_projects (
+    id INT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    channel_id INT NOT NULL REFERENCES channels(id),
+    dev_server_id INT NOT NULL REFERENCES dev_servers(id),
+    name TEXT NOT NULL,
+    path TEXT NOT NULL
+);
+
+ALTER TABLE projects ADD COLUMN remote_project_id INTEGER REFERENCES remote_projects(id);