Test AutoPub & GitHub Actions CI

1. Create repository
2. Create GitHub and PyPI tokens with appropriate scopes
3. Add GH_TOKEN & PYPI_PASSWORD environment variables via repository Settings > Secrets > New secret
4. Create .github/workflows and add appropriate GitHub CI workflow
5. Add appropriate AutoPub configuration to pyproject.toml
6. Add RELEASE.md file with release type and description
7. git add ., commit, and push