move generated stubs to separate directory, too messty

django-stubs-generated/contrib/admin/views/decorators.pyi

@@ -0,0 +1,8 @@
+from typing import Any, Callable, Optional
+
+
+def staff_member_required(
+    view_func: Optional[Callable] = ...,
+    redirect_field_name: str = ...,
+    login_url: str = ...,
+) -> Callable: ...