fix - cant delete admin role

apps/authorization/exception.py

@@ -0,0 +1,8 @@
+from rest_framework import status
+from rest_framework.exceptions import APIException
+
+
+class AdminRoleDeleteException(APIException):
+    status_code = status.HTTP_403_FORBIDDEN
+    default_detail = 'نقش ادمین قابلیت حذف شدن ندارد'  # noqa
+    default_code = 'admin_role_delete_exception'