merge user, admin and common dialogs to one folder

app/bot/dialogs/widgets/getters.py

@@ -6,3 +6,8 @@ async def username_getter(
     dialog_manager: DialogManager, event_from_user: User, **kwargs
 ) -> dict[str, str]:
     return {"username": event_from_user.username}
+
+async def is_admin(
+    dialog_manager: DialogManager, event_from_user: User, **kwargs
+) -> dict[str, str]:
+    return {"is_admin": False}