Integrated the mpes parser and adapted the GUI to latest experimental data.

dependencies/nomad-meta-info

dependencies/parsers/mpes

gui/src/components/api.js

gui/src/components/domains.js

gui/src/components/ems/EMSEntryCards.js

gui/src/components/ems/EMSEntryOverview.js

gui/src/components/ems/EMSSearchAggregations.js

gui/src/components/entry/ArchiveEntryView.js

gui/src/components/entry/RepoEntryView.js

gui/src/components/search/SearchPage.js

nomad/api/archive.py

nomad/api/raw.py

nomad/datamodel/ems.py

nomad/parsing/__init__.py

tests/test_api.py