pylance compatibility: have static modules rather than dynamic ones

The Pyside6 __init__.py file defines __all__ in a dynamic manner, so static type checkers will not work with it. If this library is important to you, please work with the library maintainer to define __all__ in a way that conforms to this guidance, which we established by working with other Python type checkers and language servers.

__all__ = list("Qt" + body for body in "Core;Gui;Widgets;...".split(";"))

should be changed to

__all__ = ["QtCore", "QtGui", "QtWidgets", ...]