Add script to automatically publish new releases to PyPI

[RemiLehe]

This adds a script to automatically publish new PICMI releases to PyPI (see https://docs.pypi.org/trusted-publishers/)

Inspired by: https://github.com/LASY-org/lasy/pull/159 Also used in:

• https://github.com/fbpic/fbpic/pull/675
• https://github.com/openPMD/openPMD-viewer/pull/413

[dpgrote]

Thanks! This looks good. Two comments:

Could the same comment that was added to the README in fbpic be added here?

This uses python 3.11. Is there a reason not to use the latest, python 3.12?

[dpgrote]

Can you also update the text in PICMI_Python/README.md, removing the comments on how to upload to PyPI?