[$] Python packaging and its tools

The Python-packaging discussions continued in January and February; theyshow no sign of abating in March either. This time around, we look (again)at tools for packaging, including a brand new Rust-based entrant. There isalso a proposal to have interested parties create Python EnhancementProposals (PEPs) for packaging solutions that would be judged by a panel ofPEP delegates in order to try to choose something that the whole communitycan rally around-without precluding the existence of other options. Asalways, it is all a difficult balancing act.