Add poetry information for Python projects

[eblis]

Would be nice if clink showed poetry information for Python packages, like the package version number or maybe even venv name (without having to go inside the venv itself with poetry shell).

[chrisant996]

How widely is poetry used?

1. The PR creates additional complexity that I can't really test or support.
2. The PR decreases performance a little for everyone who uses the python module, regardless whether they use poetry.

[eblis]

We use poetry quite a lot ourselves, not sure about other companies, but it is used afaik.

Maybe it's better if it's moved to a separate module called package which can then support multiple formats, poetry being the first (and only one) for now. Also has the benefit of being able to see both the package version as well as the venv.

[chrisant996]

I think it's a great idea.

I'm not going to implement it myself, and I'm not going to take over maintenance of it.

So it belongs as a custom module that's distributed separately from clink-flex-prompt.

[eblis]

I understand. I'll create my own repository with the custom module(s), just have to find the time 😄