PIPI and Posy: The Mythical Source of Truth

The PIPI is kind of the definitive source of truth as the package creator intended it to be. And posy is a full reimplementation of PIP, you know, like metadata parsers and result dependency resolvers and archive installers. Except I rewrote it all in Rust, as is the style. It doesn't support your VMs or your user installed Python's yet. But for now, sort of the, for the MVP, it's just like, okay, yeah, you have a PI by, I will grab that. I will arrange them all to run together based on what you need.