pyCHX upgrade with pixi

[Jennefer Maldonado (jennmald)]

Goal of this PR was to update PyCHX to have proper linting applied and move to using pixi as a package manager.
This was originally started in the effort to make the streamlined procedure at the request of JGoodrichBNL and Andrei for releases to keep this package up to date.

[JGoodrichBNL]

I'm spending some time this shutdown trying to do some work on pyCHX and came across this. This generally looks helpful, but I'm wondering if we could figure out if this collides with any of the work Xiaogang Yang (@XYangXRay) did recently. Perhaps a short meeting would be helpful? CCing Padraic Shafer (@padraic-shafer)

[Padraic Shafer (padraic-shafer)]

There are a lot of changes in this PR. Without any PR description, it's difficult to guess what approach or strategy you were applying.

Jennefer Maldonado (@jennmald) If this PR is still applicable, could you provide some guidance about the various categories of changes? For example, were many of the files changed automatically by applying linter fixes?

[JGoodrichBNL]

My question is does this PR conflict with the work Xiaogang Yang (@XYangXRay) did in PRs 93-97?

[Jennefer Maldonado (jennmald)]

it looks like most of those PRs are empty for deployment purposes so I would guess no, but Xiaogang can confirm better than myself.

[Padraic Shafer (padraic-shafer)]

Indeed, #94-97 were intentionally empty commits...intended just to test the firing of GH webhooks.

#94-97 have no effect on the pyCHX code, and no effect on the repo infrastructure.

[Padraic Shafer (padraic-shafer)]

#93 was cancelled (closed without merging it) because it was not needed.