Add Python CI matrix + coverage and release-based PyPI publish workflow

[Copilot]

This PR adds the missing GitHub automation needed for PyPI publishing readiness: continuous integration with linting/tests across multiple Python versions and continuous delivery for release-triggered PyPI publishing. It also wires README status visibility and aligns coverage collection with the Python package path.

• CI workflow (.github/workflows/ci.yml)

  • Adds a Python version matrix: 3.9, 3.10, 3.11
  • Adds code-quality linting via ruff
  • Adds automated test execution with coverage via pytest-cov and pytest --cov=genetic_algorithm
  • Sets explicit minimal workflow permissions (contents: read)

• CD workflow for PyPI (.github/workflows/publish.yml)

  • Adds release-driven publish flow (on: release: published)
  • Builds distributions with python -m build
  • Publishes to PyPI using pypa/gh-action-pypi-publish with OIDC (id-token: write)

• Python package coverage target alignment

  • Adds lightweight genetic_algorithm package alias (genetic_algorithm/__init__.py) that re-exports from compiled ga module
  • Updates pyproject.toml to include wheel.packages = ["genetic_algorithm"] so coverage target exists in installed package layout

• README status badge

  • Adds CI badge for actions/workflows/ci.yml

• Focused Python compatibility test

  • Adds tests/test_python_package.py to verify genetic_algorithm import surface is exposed (e.g., Config, Result)

Example of the new CI matrix + coverage step:

strategy:
  matrix:
    python-version: ["3.9", "3.10", "3.11"]

- name: Run Python tests with coverage
  run: pytest --cov=genetic_algorithm

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