Merge branch 'workflow_parsers' into 'v1.0.0'

.gitmodules

dependencies/parsers/aflow

nomad/datamodel/metainfo/simulation/calculation.py

nomad/datamodel/metainfo/simulation/run.py

nomad/datamodel/metainfo/workflow.py

nomad/normalizing/workflow.py

nomad/parsing/parsers.py

tests/data/parsers/aflow/aflow.agl.out

tests/data/parsers/aflow/aflowlib.json

tests/normalizing/test_system.py

tests/parsing/test_parsing.py