Add delete room command and enhance room management in yourchat2

Introduced the `delete_room` command to allow users to remove temporary chat rooms, with appropriate access checks for room creators and admins. Updated the `RoomMeta` structure to include the `created_by_chat_user_id` field for better tracking of room ownership. Enhanced error handling in room access validation for improved user feedback during room deletion and initialization processes.

src/db.rs

@@ -219,6 +219,7 @@ pub async fn load_room_configs(config: &ServerConfig) -> Result<Vec<RoomMeta>, &
             max_age: row.get::<_, Option<i32>>("max_age"),
             is_public: row.get::<_, bool>("is_public"),
             owner_id: row.get::<_, Option<i32>>("owner_id"),
+            created_by_chat_user_id: None,
             room_type_id: row.get::<_, Option<i32>>("room_type_id"),
             friends_of_owner_only: row.get::<_, bool>("friends_of_owner_only"),
             is_temporary: false,