Use ruff for linting in the CI

[luisfpereira]

ruff is definitely faster than flake8 (see repo README) and supports "Drop-in parity with Flake8, isort, and Black".

I think we should replace them in our CI and update pre-commit to be based on ruff.

NB: it is already used in some libraries in our ecosystem (e.g. SciPy).

Green light here, @ninamiolane? (I'm thinking about also using it in neurometry.)

[ninamiolane]

Fantastic idea! Green light !

[ninamiolane]

@luisfpereira should we use the opportunity to also remove deep source ? I feel that we do not use it as much, so it's mostly making the unit tests process more cumbersome.