Improve repository quality and automation

[mertsamig]

This submission systematically improves the overall quality of the repository by enforcing coding standards, enhancing documentation, and introducing automated CI/CD.

Key changes:

• Created .github/workflows/matlab-tests.yml to run automated tests on every push/PR.
• Renamed all methods and properties in BeautifyFigureTest.m to snake_case to comply with AGENTS.md.
• Wrapped lines exceeding 100 characters in beautify_figure.m, BeautifyFigureTest.m, test_beautify_figure.m, and verify_optimization.m.
• Replaced the loop variable i with k_idx in beautify_figure.m's validate_parameters function.
• Removed outdated/redundant comments from beautify_figure.m.
• Updated README.md with a new 'Development' section covering coding standards and CI/CD.
• Corrected evalc calls in tests to use proper MATLAB syntax for command strings.

These changes ensure the repository is more robust, consistent, and maintainable.

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PR created automatically by Jules for task 17541256326559033116 started by @mertsamig

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