Changed the default value of the overlap_ratio_wh argument to None, as this parameter will be deprecated in version 0.27.0. This change allows a smoother transition by not forcing users to explicitly set it to None.
Additionally, added tests for validating the overlap arguments (overlap_wh and overlap_ratio_wh) to ensure proper error handling and usage. Also started implementing tests for the offset generation method to verify that slices are correctly calculated based on the overlap settings.