Fixing Python User Site Dependency Contamination on Linux - My working prototype

I started this project as a way of avoiding the dependency issues that I’ve been having while building FreeCAD from source so that I can get IME support to work in FreeCAD on Linux Mint 22.3, which is an LTS distro. FreeCAD AppImages and Flatpacks don’t work with IMEs. It’s a build issue and they’ve not figured it out yet. I cloned the current main repository of FreeCAD, which works when building with pixi. However FreeCAD also checks the user site for dependencies in various locations for vari...