Switch to `ruff` as the formatter

[mhucka]

What is the task?

In other projects such as Cirq, we're migrating away from Black to use ruff. We should convert qsim to do the same. Tips for how to proceed can be found in Cirq issue #7505.

(Optional) Do you have ideas or preferences for the approach?

No response

How urgent is this for you?

None