Quick local Makefile build test

[kfdm]

This is admittedly a very rough sketch, but could possibly add a build target like this to allow one to run 'make local' if they already have Python installed and don't want to spin up docker.

If this is something you would be interested in, I can do some cleanup :)

[hodgesmr]

I like this idea a lot. I haven't actually checked what the minimum Python version is, but it's likely not 3.11 (and probably don't want to insist on running a specific minor version?)

[behinger]

minor: it worked fine for me with python 3.9 on Ubuntu edit: 3.7 was not enough

[kfdm]

Did a rebase and made a few more changes with some more detailed comments.