Merge branch 'add-protocols-retriever' into 'master'

.pre-commit-config.yaml

conda/meta.yaml

doc/catalog.json

doc/datasets.rst

pyproject.toml

src/bob/pipelines/__init__.py

src/bob/pipelines/dataset/__init__.py

src/bob/pipelines/dataset/database.py

src/bob/pipelines/dataset/protocols/__init__.py

src/bob/pipelines/dataset/protocols/archive.py

src/bob/pipelines/dataset/protocols/hashing.py

src/bob/pipelines/dataset/protocols/retrieve.py

src/bob/pipelines/distributed/sge.py

src/bob/pipelines/wrappers.py

src/bob/pipelines/xarray.py

tests/test_database.py

tests/test_samples.py

tests/test_utils.py

tests/test_wrappers.py

tests/test_xarray.py