Add magic square game

[eliottrosenberg]

Add the Mermin-Peres magic square game described in https://en.wikipedia.org/wiki/Quantum_pseudo-telepathy#The_magic_square_game

[codecov]

Codecov Report

Attention: Patch coverage is 99.15966% with 1 line in your changes missing coverage. Please review.

Project coverage is 98.15%. Comparing base (2ad4136) to head (d5c530a).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
examples/magic_square.py	99.07%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7109      +/-   ##
==========================================
- Coverage   98.15%   98.15%   -0.01%     
==========================================
  Files        1089     1091       +2     
  Lines       95251    95374     +123     
==========================================
+ Hits        93497    93614     +117     
- Misses       1754     1760       +6     

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