move generated stubs to separate directory, too messty

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

@@ -0,0 +1,23 @@
+from typing import Any, Dict, Optional, Union
+
+from django import forms
+from django.db.models.query import QuerySet
+
+
+class FlatpageForm(forms.ModelForm):
+    auto_id: str
+    data: Dict[str, Union[List[int], str]]
+    empty_permitted: bool
+    error_class: Type[django.forms.utils.ErrorList]
+    fields: collections.OrderedDict
+    files: Dict[Any, Any]
+    initial: Dict[str, Union[List[django.contrib.sites.models.Site], int, str]]
+    instance: django.contrib.flatpages.models.FlatPage
+    is_bound: bool
+    label_suffix: str
+    url: Any = ...
+    class Meta:
+        model: Any = ...
+        fields: str = ...
+    def clean_url(self) -> str: ...
+    def clean(self) -> Dict[str, Union[bool, QuerySet, str]]: ...