Release 2.0.3

Implement SaT (https://arxiv.org/abs/2406.16678) and switch the default models to SaT🚀

The previous WtP models are still available but SaT is strictly better in accuracy and speed. See the updated README for details: https://github.com/segment-any-text/wtpsplit.

SaT was implemented and developed by @markus583 @igorsterner.