ci: Add Python CI workflow with matrix builds and linting

[SoClosee]

This PR adds a GitHub Actions workflow for continuous integration. The workflow includes:

• Matrix Builds: Tests the code against multiple Python versions (3.8, 3.9, 3.10) to ensure compatibility.
• Dependency Caching: Uses caching for pip dependencies to speed up installation times.
• Linting: Includes a job to run flake8 on the codebase to enforce coding standards.

This setup ensures that any changes are tested against multiple environments and adhere to coding best practices before being merged into the main branch.

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