move generated stubs to separate directory, too messty

django-stubs-generated/db/migrations/utils.pyi

@@ -0,0 +1,13 @@
+from typing import Any, Optional
+
+from django.utils.functional import SimpleLazyObject
+
+COMPILED_REGEX_TYPE: Any
+
+class RegexObject:
+    pattern: str = ...
+    flags: int = ...
+    def __init__(self, obj: SimpleLazyObject) -> None: ...
+    def __eq__(self, other: RegexObject) -> bool: ...
+
+def get_migration_name_timestamp() -> str: ...