fix: update setuptools requirement to >=77 for PEP639 support

[niveshdandyan]

Summary

• Updates the setuptools minimum version requirement from >=61 to >=77 in pyproject.toml
• This change is required because the project uses PEP639 project source metadata fields (license = "MIT" and license-files = ["LICENSE"]) which are only supported in setuptools 77+

Changes

• Changed requires = ["setuptools>=61", "wheel"] to requires = ["setuptools>=77", "wheel"] in the [build-system] section of pyproject.toml

Related Issue

Fixes #1052

Testing

• All existing tests pass (205 passed, 2 skipped)
• Changes verified twice
• TOML syntax validated

References

• PEP 639
• Packaging Guide - Licensing

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This contribution was made with AI assistance (Claude). The code was reviewed and tested before submission.

[benoit-cty]

Thanks for taking this so fast.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.26%. Comparing base (1db90eb) to head (2d52a20).
⚠️ Report is 4 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1053   +/-   ##
=======================================
  Coverage   68.26%   68.26%           
=======================================
  Files          41       41           
  Lines        3847     3847           
=======================================
  Hits         2626     2626           
  Misses       1221     1221           

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