remote projects per user (#10594)

Release Notes:

- Made remote projects per-user instead of per-channel. If you'd like to
be part of the remote development alpha, please email hi@zed.dev.

---------

Co-authored-by: Bennet Bo Fenner <53836821+bennetbo@users.noreply.github.com>
Co-authored-by: Bennet <bennetbo@gmx.de>
Co-authored-by: Nate Butler <1714999+iamnbutler@users.noreply.github.com>
Co-authored-by: Nate Butler <iamnbutler@gmail.com>

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

@@ -398,26 +398,21 @@ CREATE TABLE hosted_projects (
     channel_id INTEGER NOT NULL REFERENCES channels(id),
     name TEXT NOT NULL,
     visibility TEXT NOT NULL,
-    deleted_at TIMESTAMP NULL,
-    dev_server_id INTEGER REFERENCES dev_servers(id),
-    dev_server_path TEXT
+    deleted_at TIMESTAMP NULL
 );
 CREATE INDEX idx_hosted_projects_on_channel_id ON hosted_projects (channel_id);
 CREATE UNIQUE INDEX uix_hosted_projects_on_channel_id_and_name ON hosted_projects (channel_id, name) WHERE (deleted_at IS NULL);
 
 CREATE TABLE dev_servers (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
-    channel_id INTEGER NOT NULL REFERENCES channels(id),
+    user_id INTEGER NOT NULL REFERENCES users(id),
     name TEXT NOT NULL,
     hashed_token TEXT NOT NULL
 );
-CREATE INDEX idx_dev_servers_on_channel_id ON dev_servers (channel_id);
 
 CREATE TABLE remote_projects (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
-    channel_id INTEGER NOT NULL REFERENCES channels(id),
     dev_server_id INTEGER NOT NULL REFERENCES dev_servers(id),
-    name TEXT NOT NULL,
     path TEXT NOT NULL
 );