Set up PyPI and Codecov integration

[LearnHD]

Tasks needed to complete CI/CD setup:

1. PyPI Setup:

   • Create PyPI account
   • Generate PyPI API token
   • Add PyPI token as GitHub secret (PYPI_API_TOKEN)
   • Test package publishing with test PyPI

2. Codecov Setup:

   • Set up Codecov account
   • Add repository to Codecov
   • Get Codecov token
   • Add Codecov token as GitHub secret (CODECOV_TOKEN)
   • Test coverage reporting

3. Documentation:

   • Update README with correct badge URLs
   • Add setup instructions to contributing guidelines
   • Document release process

Please complete these tasks to enable automated package publishing and coverage reporting.