✨ 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 92.6%. Comparing base (e078ad5) to head (1894bf8).
Report is 75 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #411   +/-   ##
=====================================
  Coverage   92.6%   92.6%           
=====================================
  Files         37      37           
  Lines       2726    2726           
  Branches     305     305           
=====================================
+ Hits        2526    2527    +1     
+ Misses       200     199    -1     

Flag	Coverage Δ
cpp	94.6% <ø> (+<0.1%)	⬆️
python	87.3% <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.