Add nix flake and convert to modern pyproject

[patrickjeremic]

Updates the project to a more modern pyproject.toml and add a nix flake to be used with chorusos-nix. This additionally auto formats the code.

[vchong]

would be nice to have the formatting changes in a commit of its own

[resonant-riches]

Possibly also <2.0 unless you have fixed that problem.

[patrickjeremic]

In uv.lock you can see numpy being at 2.2.6 and i confirmed both flows (read and write) with it. Not sure what was causing the issue outside of nix before

You're correct, running uv sync + uv run python xfer.py read in the nix shell doesn't seem to work. Just running nix run .#default seems to run successfully. Seems to be something off with the python deps still.

[patrickjeremic]

I converted the project to uv2nix (https://pyproject-nix.github.io/uv2nix/templates.html) and it now covers all potential paths (Running python xfer.py, uv run python xfer.py and xfer in the dev shell, where xfer is just a wrapper to the xfer.py file). I also confirmed the stand alone binary to work. I didn't see any issues with the new numpy version interestingly.

[patrickjeremic]

Thanks for the reviews, i cleaned up the commits further and split up the formatting into a seperate commit.