This is the beginning of work on this feature, it's a little comment-heavy
to that end and has some patterns that may not be permanent (these have
generally been noted as such). As of this commit, there are tests that
start to poke at this, namely the one that brings in fastapi, which currently
fails due to an extension it doesn't like.

Proof of concept for package support in dynamic Python workers.
As of this commit, it can retrieve an sdist with a flat layout from pypi and
install it into the virtual filesystem. It doesn't do dependency resolution,
so the current tests fail when attempting to import FastAPI's deps.

Used sdists before, now it uses wheels. Pre cleanup commit

This test only needs to confirm that retrieval of a hard list of pure python packages, without
dependency resolution, works.

This seems to be specific to JS packages

This dependendency caused issues when working in a container, but its removal
was purely for my sake

This reverts commit 4f8990d.

Also makes PyprojectToml interface less stringent

These got caught by the checks done by `pnpm run check`

These are already set implicitly by createWorker

Remove check for when there are no dependencies, since there will always
be at least one

This is implicit on Python dynamic workers now

…the result object

…oml and package.json in one worker