move generated stubs to separate directory, too messty

django-stubs-generated/utils/_os.pyi

@@ -0,0 +1,9 @@
+from os.path import abspath
+from typing import Any, Optional, Union
+
+abspathu = abspath
+
+def upath(path: Any): ...
+def npath(path: Any): ...
+def safe_join(base: Union[bytes, str], *paths: Any) -> str: ...
+def symlinks_supported() -> Any: ...