Refactored datamodel to use metainfo2. #221

docs/datamodel_metadataflow.png

docs/datamodel_transformations.png

docs/introduction.md

examples/domain.py

gui/src/components/metaInfoBrowser/MetaInfoBrowser.js

nomad/app/__init__.py

nomad/app/api/__init__.py

nomad/app/api/api.py

nomad/app/api/archive.py

nomad/app/api/auth.py

nomad/app/api/common.py

nomad/app/api/dataset.py

nomad/app/api/info.py

nomad/app/api/mirror.py

nomad/app/api/raw.py

nomad/app/api/repo.py

nomad/app/api/upload.py

nomad/app/common.py

nomad/app/optimade/__init__.py

nomad/app/optimade/api.py