migrate package meta to `pyproject.toml`

[Borda]

Issue #, if available: it is follow-up on #3075

Description of changes: migrating meta data from legacy setup.cfg to new pyproject.toml but to be complete still not sure how to resolve a few remaining references:

• [ ] entry_point overwrite with pygments style
• [ ] aliases if they are still needed
• [ ] build_sphinx seem it would need additional package sphinx-pyproject
• [ ] mypy seems does not have support for plugins

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

Please tag this pr with at least one of these labels to make our release process faster: BREAKING, new feature, bug fix, other change, dev setup