Replace Black with Ruff

[Luca-Blight]

Can I make this change to Github actions file and requirements.txt?

Performance gains are overwhelming and this package has recently been implemented by FastAPI and other major packages.

More info: https://docs.astral.sh/ruff/

[pandadefi]

This is not a really active repo anymore and will probably remain as it is. Go check https://github.com/yearn/yearn-vaults-v3/