✨ Python 3.13 Support

[burgholzer]

Description

The (ABI-stable) release candidate for Python 3.13 just released and the newest MQT Workflows include an updated version of cibuildwheel that supports building wheels for it.

This PR enables regular Python 3.13 builds and also enables builds for the new free-threaded variant.

Checklist:

• The pull request only contains commits that are related to it.
• I have added appropriate tests and documentation.
• I have made sure that all CI jobs on GitHub pass.
• The pull request introduces no new warnings and follows the project's style guidelines.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.8%. Comparing base (7179ffa) to head (43fc722).

Additional details and impacted files

@@           Coverage Diff           @@
##            main    #430     +/-   ##
=======================================
- Coverage   96.0%   95.8%   -0.2%     
=======================================
  Files         39      39             
  Lines       1830    1831      +1     
  Branches     223     224      +1     
=======================================
- Hits        1757    1755      -2     
- Misses        73      76      +3     

Flag	Coverage Δ
cpp	95.8% <ø> (-0.3%)	⬇️
python	95.8% <ø> (ø)

see 1 file with indirect coverage changes

[burgholzer]

Just waiting on a new delvewheel release, then this is good to go and we can start publishing Python 3.13 wheels.