Use ruff as linter and formatter

[ringohoffman]

Alternative to #2754 based on @brentyi's suggestion: #2754 (comment)

Upgrade ruff and use ruff format ... as a drop in replacement for black: https://docs.astral.sh/ruff/formatter/

Also use ruff check ... --fix as a drop in replacement for isort (produces identical results as using the following isort config):

[tool.isort]
combine_as_imports = true
line_length = 120
known_first_party = ["nerfstudio"]
profile = "black"

Update pre-commit hooks, VS Code settings.json, and CI steps.

BTW you may need to run pre-commit autoupdate or clear your cache in order to start using the new ruff hooks.

[ringohoffman]

I was worried that the ruff-format pre-commit hook somehow missed the files in my last commit, but I think ruff check and ruff format just happened to affect 2 mutually exclusive groups of files.

[brentyi]

Looks good to me! @tancik any opposition to moving away from black?

[tancik]

None from me

[brentyi]

Thanks @ringohoffman!!