L2SS-1382: Added EC device skeleton

CDB/LOFAR_ConfigDb.json

CDB/stations/common.json

CDB/stations/simulators_ConfigDb.json

docker-compose/device-ec.yml

docker-compose/ec-sim.yml

docker-compose/ec-sim/Dockerfile

docker-compose/ec-sim/ec_sim.py

docker-compose/ec-sim/requirements.txt

...hon-profiles/stationcontrol-jupyter/startup/01-devices.py

...tango-prometheus-exporter/code/tango-prometheus-client.py

...compose/tango-prometheus-exporter/lofar2-fast-policy.json

docker-compose/tango-prometheus-exporter/lofar2-policy.json

sbin/run_integration_test.sh

tangostationcontrol/docs/source/devices/ec.rst

tangostationcontrol/docs/source/index.rst

tangostationcontrol/setup.cfg

...tationcontrol/tangostationcontrol/clients/opcua_client.py

...tationcontrol/tangostationcontrol/common/lofar_logging.py

tangostationcontrol/tangostationcontrol/devices/README.md

tangostationcontrol/tangostationcontrol/devices/docker.py