move generated stubs to separate directory, too messty

django-stubs-generated/utils/safestring.pyi

@@ -0,0 +1,19 @@
+from typing import Any, Callable, Optional, Union
+
+from django.forms.boundfield import BoundField
+
+
+class SafeData:
+    def __html__(self) -> SafeText: ...
+
+class SafeBytes(bytes, SafeData):
+    def __add__(self, rhs: Any): ...
+
+class SafeText(str, SafeData):
+    def __add__(self, rhs: str) -> str: ...
+
+SafeString = SafeText
+
+def mark_safe(
+    s: Union[Callable, BoundField, str]
+) -> Union[Callable, BoundField, str]: ...