Modernize packaging method used by project

[ngie-eign]

• Replace setup.py use with pyproject.toml.
• Add tox integration.
• Move files under appropriate directories to match modern python project
  design structure.

Also add a .gitignore file while here.

[ngie-eign]

@mentalisttraceur : thank you again for your work on the project. I figured this was the least I could do given it's a core part of one of my other small projects.

[mentalisttraceur]

Nice, thank you! This is a huge help to get me started on modern Python packaging.

I'll hopefully be able to take a closer look within the next 7 days, kinda busy nowadays.

What I'll probably do is merge this as-is, then I'll delete and incrementally re-add pieces as I have time to get acquainted with them. That way you get full credit in repo history, and I can still go through my usual overwrought process.

Question: for the .gitignore, can you share which lines were specifically useful to you in this repo/work, vs which ones are just generic/futureproofing?

[ngie-eign]

Nice, thank you! This is a huge help to get me started on modern Python packaging.

Awesome possum -- glad to be of assistance!

There are so many flavors for doing this today -- I just picked the one that's pretty standard per the docs and doesn't involve a large dependency change to install packages (pipenv, pipe, uv, etc). Those tools all have their own respective pros, but introducing the project to the basics first seemed like the best course of action.

I'll hopefully be able to take a closer look within the next 7 days, kinda busy nowadays.

I hear you!

What I'll probably do is merge this as-is, then I'll delete and incrementally re-add pieces as I have time to get acquainted with them. That way you get full credit in repo history, and I can still go through my usual overwrought process.

🙏!

Question: for the .gitignore, can you share which lines were specifically useful to you in this repo/work, vs which ones are just generic/futureproofing?

All of the entries in the file are/should be the stock .gitignore entries provided by GitHub with their python project repo template.