[Python] Support releasing with poetry

[brasmusson]

🤔 What's changed?

Added the files necessary to be able to release with poetry

⚡️ What's your motivation?

Since cucumber-expressions use poetry for release, also using poetry for release enables the coordination of GitHub actions for release workflows.

🏷️ What kind of change is this?

• 🏦 Refactoring/debt/DX (improvement to code design, tooling, documentation etc. without changing behaviour)

♻️ Anything particular you want feedback on?

📋 Checklist:

• I agree to respect and uphold the Cucumber Community Code of Conduct
• I've changed the behaviour of the code
  • I have added/updated tests to cover my changes.
• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
• Users should know about my change
  • I have added an entry to the "Unreleased" section of the CHANGELOG, linking to this pull request.

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[ehuelsmann]

I think this PR should be taken as a basis to build a GitHub Action to release Python projects.

[brasmusson]

Use setuptools for building distribution packages. Automated release workflow using setuptools added in #213