Add python 3.13 support

[Faxulous]

Changes

• Updated PyO3 dependency to 0.24 (supports Python 3.13)
• Updated Rust code to use PyO3 0.20+ API (Bound<'_, PyModule>)
• Added Python 3.13 classifier to package metadata
• Bumped version to 0.2.2

Testing

• All existing tests pass on Python 3.13
• Package builds successfully on Windows with Python 3.13 (cp313-cp313-win_amd64)

Notes

This PR supersedes #16 by including both the PyO3 dependency update AND the required Rust code migration to the new PyO3 API. The dependabot PR fails because it's missing the code changes needed for PyO3 0.20+.