feat(tasklist): Show tasklists in private rooms.

Also adds a `get_rooms` method to the `RoomCog`.

src/modules/__init__.py

@@ -9,10 +9,10 @@ active = [
     '.ranks',
     '.reminders',
     '.shop',
-    '.tasklist',
     '.statistics',
     '.pomodoro',
     '.rooms',
+    '.tasklist',
     '.rolemenus',
     '.member_admin',
     '.moderation',