Add pre-commit checks to ProteoBench

[wolski]

My colleague @leoschwarz suggested using pre-commit hooks and helped me add a .pre-commit-config.yaml file.

To enable pre-commit checks on your machine install :

pipx install pre-commit

To run all the pre-commit checks on all files, run:

pre-commit run --all-files

To enable automatic pre-commit checks, run:

pre-commit install