feat: add security related settings

proto/api/v1/workspace_service.proto

@@ -21,10 +21,6 @@ message WorkspaceProfile {
   string version = 2;
   // mode is the instance mode (e.g. "prod", "dev" or "demo").
   string mode = 3;
-  // public is a flag that the instance is open for other users.
-  bool public = 4;
-  // password_auth is a flag whether the instance allows password authentication.
-  bool password_auth = 5;
   // instance_url is the URL of the instance.
   string instance_url = 6;
 }