[Python] Update to require Python >= 3.13 and reduce CI load

[konard]

🎯 Summary

This PR updates the Python package to require only Python 3.13 or higher, reducing the GitHub Actions load by eliminating matrix testing across multiple Python versions.

📋 Issue Reference

Fixes #123

🔧 Changes Made

Package Configuration (python/pyproject.toml)

• Updated requires-python from >=3.8 to >=3.13
• Removed Python version classifiers for 3.8-3.12
• Kept only Python 3.13 classifier
• Bumped package version from 0.9.0 to 0.10.0

CI Workflow (.github/workflows/python.yml)

• Removed matrix strategy that tested Python versions 3.8, 3.9, 3.10, 3.11, 3.12
• Updated to test only Python 3.13
• Updated all Python setup steps to use version 3.13 consistently across all jobs (test, publishToPyPI, publishRelease)

✅ Benefits

• Reduced CI Load: Single test run instead of 5 parallel jobs reduces GitHub Actions minutes usage
• Simplified Maintenance: One Python version to support means fewer compatibility issues
• Modern Features: Python 3.13 provides the latest language features and performance improvements

🧪 Testing

The changes maintain all existing test coverage, now running exclusively on Python 3.13. The CI workflow will verify:

• Package builds successfully
• All tests pass on Python 3.13
• Package can be published to PyPI (when merged to main)

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[konard]

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