[Distutils] supporting editable installs by PEP-517/518 by shim wheels - proposing a common implementation

Hi Everyone, i'd like to propose a common tooling for installing packages in editable mode which is based on generating an actual wheel, which includes shim files for the python packages allows to sanely instal/uninstall editable packages a while back i implemented a prototype in gumby-elf which serves as my example. i'd like to start a discussion on this, and hopefully ensure that tools like flit and setuptools adapt a similar mechanism, ideally sharing a implementation once this discussion is finished i'd also like to implement it for setuptools -- Ronny