Add __all__ for modules beginning with 'u', 'x', 'w' and 'z' (#7374)

stdlib/zoneinfo/__init__.pyi

@@ -2,6 +2,8 @@ from _typeshed import Self, StrPath
 from datetime import tzinfo
 from typing import Any, Iterable, Protocol, Sequence
 
+__all__ = ["ZoneInfo", "reset_tzpath", "available_timezones", "TZPATH", "ZoneInfoNotFoundError", "InvalidTZPathWarning"]
+
 class _IOBytes(Protocol):
     def read(self, __size: int) -> bytes: ...
     def seek(self, __size: int, __whence: int = ...) -> Any: ...