Update __annotation__ in settings.py

[mothersup]

In Python 3.14, which Blender 5.0.1 uses, annotations had been reworked such that __annotations__ is not directly accessible. This is used in op/settings.py, and causes the following error when used in Blender 5.0.1:

Python: Traceback (most recent call last):
File "..../io_scene_ueformat/op/import_helpers.py", line 27, in execute
options = self.options_class.from_settings(context.scene.uf_settings)
File "..../io_scene_ueformat/options.py", line 21, in from_settings
k: v for k, v in settings.get_props().items()
~~~~~~~~~~~~~~~~~~^^
File "..../io_scene_ueformat/op/settings.py", line 23, in get_props
for key in self.__annotations__.keys():
^^^^^^^^^^^^^^^^^^^^
AttributeError: 'UFSettings' object has no attribute '__annotations__'. Did you mean: '__annotate_func__'?

My fix is to use annotationlib.get_annotations instead of __annotations__.