feat: migrate to pyproject.toml (#736) * migrate to pyproject.toml * remove version * remove readme_filename * remove long_description * dynamic version * move description * move urls * move packages * zip_safe is deprecated * include-package-data = true by default * platforms are ignored * Add copyright notice * proto-plus when python_version >= '3.13' * remove mypy.ini * remove pytest.ini --------- Co-authored-by: Anthonios Partheniou <[email protected]>