[pre-commit] Add pre-commit and run it on all files

.flake8

.gitlab-ci.yml

.isort.cfg

.pre-commit-config.yaml

LICENSE

bob/pipelines/__init__.py

bob/pipelines/config/distributed/dask_it_pipeline.py

bob/pipelines/config/distributed/local_parallel.py

bob/pipelines/config/distributed/sge_default.py

bob/pipelines/config/distributed/sge_demanding.py

bob/pipelines/config/distributed/sge_light.py

bob/pipelines/datasets/csv.py

bob/pipelines/datasets/json.py

bob/pipelines/distributed/sge.py

bob/pipelines/distributed/sge_queues.py

bob/pipelines/sample.py

bob/pipelines/tests/test_datasets.py

bob/pipelines/tests/test_samples.py

bob/pipelines/tests/test_transformers.py

bob/pipelines/tests/test_utils.py