Add slot list service to ohme (#134170)

homeassistant/components/ohme/__init__.py

homeassistant/components/ohme/icons.json

homeassistant/components/ohme/quality_scale.yaml

homeassistant/components/ohme/services.py

homeassistant/components/ohme/services.yaml

homeassistant/components/ohme/strings.json

tests/components/ohme/conftest.py

tests/components/ohme/snapshots/test_services.ambr

tests/components/ohme/test_services.py