move generated stubs to separate directory, too messty

django-stubs-generated/contrib/flatpages/middleware.pyi

@@ -0,0 +1,12 @@
+from typing import Any, Optional
+
+from django.core.handlers.wsgi import WSGIRequest
+from django.http.response import HttpResponse
+from django.utils.deprecation import MiddlewareMixin
+
+
+class FlatpageFallbackMiddleware(MiddlewareMixin):
+    get_response: Callable
+    def process_response(
+        self, request: WSGIRequest, response: HttpResponse
+    ) -> HttpResponse: ...