build: always use uv for dependency management

[tdstein]

Modifies the build tooling to always use uv pip instead of pip and uv build instead of python -m build.

Additional checks are added to ensure that uv exists on the system. If uv does not exists, then it is installed via pip. If pip is not installed, it is installed via python -m ensurepip. The pip check is required for a virtual environment created by uv venv since by default, uv venv does not install pip.

The UV_SYSTEM_PYTHON environment variable is set in CI and Docker to force uv to use the system Python environment instead of depending on a virtual environment. See https://docs.astral.sh/uv/configuration/environment/

This reduces the execution time of make from 22s to 5s on my machine without a Pip cache. With a hydrated PIp cache, the execution time is reduced from 8s to 2s.

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
1257	1212	96%	0%	🟢

New Files

No new covered files...

Modified Files

No covered modified files...

updated for commit: 818e1b8 by action🐍

[zackverham]

cool - makes sense to me!

I'm not super familiar with uv but it looks to be pretty easy to drop-in as a replacement.