Add Python tests

[nosracd]

This PR adds a set of unit tests to test the Python module and wires the CI to run the tests for each wheel that gets built. Some platforms failed the test, mainly due to import errors (although one was unable to install the wheel), so these platforms no longer have wheels built for them:

• On macOS 13, for C Python versions 3.7 and 3.10 (example import failure, example install failure)
• All PyPy builds (example import failure)

Also, it appears that the latest version of cibuildwheel now supports Python 3.13 so I bumped the cibuildwheel version and added Python 3.13 targets.