added db mapping export capability (from base package mitm-tooling)

app/core/__init__.py

app/dependencies/db_dependencies.py

app/logic/mitm.py

app/models/export.py

app/models/mitm.py

app/routers/control.py

app/routers/mitm.py

app/state_accessors/retrievers.py

app/state_mutators/virtual_db_state_mutators.py

forks/eralchemy

pyproject.toml

schema/gen_open_api_schema.py

schema/openapi.json

schema/openapi.yaml

schema/standalone-mapping-schema.yaml