move generated stubs to separate directory, too messty

django-stubs-generated/core/mail/backends/base.pyi

@@ -0,0 +1,13 @@
+from typing import Any, Optional
+
+
+class BaseEmailBackend:
+    fail_silently: Any = ...
+    def __init__(self, fail_silently: bool = ..., **kwargs: Any) -> None: ...
+    def open(self) -> None: ...
+    def close(self) -> None: ...
+    def __enter__(self) -> BaseEmailBackend: ...
+    def __exit__(
+        self, exc_type: None, exc_value: None, traceback: None
+    ) -> None: ...
+    def send_messages(self, email_messages: Any) -> None: ...