Add alternative method for running with inline script dependencies + uv

[blackary]

This updates the python version to have inline script depdencies, and suggests using uv in the README.

This is a nice pattern for one-time-use scripts, as it doesn't require any special setup, just uv run <script>, and lets uv take care of making sure python is installed, and installing any relevant dependencies.

[PedramNavid]

lgtm

[tdhopper]

[sfc-gh-trichards]

outstanding