Moved app_fastapi to app.

Dockerfile

docs/api_reference.rst

nomad/app/__init__.py

nomad/app/flask/.gitignore

nomad/app/flask/__init__.py

nomad/app/flask/__main__.py

nomad/app/flask/api/__init__.py

nomad/app/flask/api/api.py

nomad/app/flask/api/archive.py

nomad/app/flask/api/auth.py

nomad/app/flask/api/common.py

nomad/app/flask/api/dataset.py

nomad/app/flask/api/encyclopedia.py

nomad/app/flask/api/encyclopedia_grammar.lark

nomad/app/flask/api/info.py

nomad/app/flask/api/materialtransformer.py

nomad/app/flask/api/metainfo.py

nomad/app/flask/api/mirror.py

nomad/app/flask/api/raw.py

nomad/app/flask/api/repo.py