Update packaging

[vtnate]

• Use pyproject.toml
  • For centralized config of everything
• Use ruff for linting and formatting
  • So code has the same style throughout this repo
• Use pre-commit
  • Linting and formatting is checked at every commit
  • Run pre-commit
    • Style changes & enforcement across the repo
• Update GitHub workflows
  • I like the breakout of installing, testing, releasing, linting. That's pretty rad. Used that framework with slightly newer innards
• Add some text to the readme, almost all of it for developers
• Increment patch version

I bumped the version, but used an rc to ensure I don't cause any problems with the releasing mechanism. @mitchute can you give me a once-through on that process? It looks like releases to PyPI happen as soon as we tag a version on GitHub, and not until then. Is that correct? Which would mean me editing the version doesn't cause any immediate problems?