Added a new endpoint for the new metainfo and adapted the depending GUI.

README.md

docs/conf.py

docs/metainfo.rst

gui/src/components/api.js

gui/src/components/entry/ArchiveEntryView.js

gui/src/components/metaInfoBrowser/DefinitionCard.js

gui/src/components/metaInfoBrowser/MetaInfoBrowser.js

gui/src/components/metaInfoBrowser/Viewer.js

nomad/app/api/__init__.py

nomad/app/api/archive.py

nomad/app/api/info.py

nomad/app/api/metainfo.py

nomad/client.py

nomad/datamodel/__init__.py

nomad/metainfo/legacy.py

nomad/metainfo/metainfo.py

tests/app/test_api.py