Automatic upload to PyPI

[marcelmbn]

• automated CD pipeline that uploads on release to the pypi platform

[marcelmbn]

Implemented by the following commits:

• https://github.com/grimme-lab/MindlessGen/commit/74cbffd03efdba692363a3fb09ebb6ae9c65f08e
• https://github.com/grimme-lab/MindlessGen/commit/c90ec9a6af4465a747586aa05a554b4138e73e47
• https://github.com/grimme-lab/MindlessGen/commit/b512d38a8f831caa908707a55497d511c738f82f
• https://github.com/grimme-lab/MindlessGen/commit/fc5fdd01b6add31fc05425b68bdb32e5b26ee1dd
• https://github.com/grimme-lab/MindlessGen/commit/03830e2225b373ae03fab47383778d9d312f355f

The relevant workflow file is here: https://github.com/grimme-lab/MindlessGen/blob/main/.github/workflows/release.yml