remoting: Allow Add/Remove remote folder (#14532)

Release Notes:

- remoting (alpha only): Allow add/remove folders to projects

---------

Co-authored-by: Max <max@zed.dev>

crates/collab/migrations.sqlite/20221109000000_test_schema.sql

@@ -414,5 +414,5 @@ CREATE TABLE dev_servers (
 CREATE TABLE dev_server_projects (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
     dev_server_id INTEGER NOT NULL REFERENCES dev_servers(id),
-    path TEXT NOT NULL
+    paths TEXT NOT NULL
 );