Add CI/CD: tests with uv, formatting with ruff/pre-commit, publish to PyPI on release

[gstenzel]

Implement a robust CI/CD pipeline for the repository:

• Set up GitHub Actions workflows for automated testing using uv https://docs.astral.sh/uv/guides/integration/github/ and poe for documentation creation.
• Integrate code formatting checks with ruff as part of pre-commit hooks.
• Configure automated publishing to PyPI on release events (e.g., when a GitHub Release is created).

This will improve code quality and streamline the release process.