Research: Try out UV for workspace and dependency management

[LuckierDodge]

• uv looks like a good potential replacement for pdm that's more performant and will play nicer with our monorepo workspace. We should explore whether it's worth switching to.
• uv: https://github.com/astral-sh/uv

[LuckierDodge]

Tried using the UV experimental feature in PDM, was quite a bit faster. However, it broke docker containers in a way I couldn't immediately crack, so needs some more dedicated development time.