environment docs

[tymbalodeon]

It might be nice to include links to documentation that is relevant to a particular environment. The command just environment documentation (alias: just env docs) can open documentation in the browser, for example to the official Python docs website, or Rust...or for a framework.

just env docs (list) -> list relevant docs
just env docs (open) <name> -> open docs in browser
just env docs open --all -> open all docs in browser

For example, the python environment could link to https://docs.python.org/3/ and https://docs.astral.sh/uv/, if not also others