move generated stubs to separate directory, too messty

django-stubs-generated/db/backends/base/client.pyi

@@ -0,0 +1,10 @@
+from typing import Any, Optional
+
+from django.db.backends.base.base import BaseDatabaseWrapper
+
+
+class BaseDatabaseClient:
+    executable_name: Any = ...
+    connection: Any = ...
+    def __init__(self, connection: BaseDatabaseWrapper) -> None: ...
+    def runshell(self) -> None: ...