Implemented coe python api mimicing #159.

nomad/coe_repo/base.py

nomad/coe_repo/calc.py

nomad/coe_repo/upload.py

nomad/config.py

nomad/datamodel/base.py

nomad/files.py

nomad/processing/data.py

ops/helm/nomad/templates/nomad-configmap.yml

ops/helm/nomad/templates/worker-deployment.yaml

ops/helm/nomad/values.yaml

tests/conftest.py

tests/processing/test_data.py

tests/test_coe_repo.py

tests/test_files.py