Replace pkg_resources and bump Python version requirements

[kafitzgerald]

Replaces the use of now deprecated pkg_resources.

Closes #200

[brian-rose]

I'm not sure that I understand everything that's going on here, but it's passing CI and I don't see anything amiss.

[dcamron]

importlib.resources.files was added in Python 3.9. I think that's a fine minimum Python to support moving forward, but we need to do more packaging cleanup before a release.

[kafitzgerald]

importlib.resources.files was added in Python 3.9. I think that's a fine minimum Python to support moving forward, but we need to do more packaging cleanup before a release.

Ah, right. And it looks like the Python versions on here are quite old at this point.

I'll put this in draft for now since it probably makes more sense to merge after those changes.

[kafitzgerald]

importlib.resources.files was added in Python 3.9. I think that's a fine minimum Python to support moving forward, but we need to do more packaging cleanup before a release.

@dcamron, I think the changes I just pushed should cover the key pieces here (i.e. Python versions and associated metadata) and a few minor things I caught along the way. Let me know if not.

I realize there's more that could be done re: packaging updates, but I think those can probably come later.

[jukent]

I'm not sure how much we are using this repo, could someone link me to if we use these datasets in Cookbooks or Foundations?

[brian-rose]

I'm not sure how much we are using this repo, could someone link me to if we use these datasets in Cookbooks or Foundations?

We use them in Foundations, e.g. here. I'm not sure if any cookbooks are using it. I think we decided at some point that the explicit scope of the package is to serve example data for Foundations but shouldn't grow beyond that.

This is laid out in the README, e.g. https://github.com/ProjectPythia/pythia-datasets?tab=readme-ov-file#adding-new-datasets

[kafitzgerald]

I'm not sure how much we are using this repo, could someone link me to if we use these datasets in Cookbooks or Foundations?

I don't know about other repos, but Foundations uses it in a few sections:
https://github.com/search?q=repo%3AProjectPythia%2Fpythia-foundations%20pythia_datasets&type=code