Add section on `uv` for advanced package resolution

[hollandjg]

Update noxfile.py, and maybe other areas with uv.

• [x] The following lines at the top of a noxfile will cause nox to be many times faster if uv is installed. For example, a sphinx job takes 4 seconds instead of 22 seconds (that includes the time sphinx takes, so basically installation is nearly 0).

  nox.needs_version = ">=2024.3.2"
  nox.options.default_venv_backend = "uv|virtualenv"

  see #71

• [ ] We should also at least point people at uv pip install, as it's able to install anything in around 0 seconds (10-100x faster than pip). We could even cover how to use uv pip compile to lock your environment, though uv's --exclude-newer basically makes this no longer important, as you can recover a working build based on a date. It might be a bit advanced, but the --resolution=lowest-direct resolution strategy is also great for testing your minimum version limits. And uv venv can make a virtual environment in less time that it takes Python to start up.

  see #89

Originally posted by @henryiii in https://github.com/INTERSECT-training/packaging/issues/12#issuecomment-2142545146

[henryiii]

Swapping the pip-tools example for uv might make sense. uv is much faster and can target python versions without having them installed, and doesn't include itself in the environment it's compiling.