Modernize Packaging: pyproject.toml

[derks]

Need to modernize packaging around pyproject.toml:

• https://packaging.python.org/en/latest/guides/modernize-setup-py-project/

Care to be had with backward compat.... perhaps this should be slated for 3.2. Additionally, should poetry or the like be considered?

[sigma67]

I was about to tackle this right now as a prerequisite for ruff and then I saw you already opened an issue :)

I would recommend using a package manger, definitely.

I would go with pdm, as I have more experience with it and it is generally more standards compliant than poetry