Add new integration Qbus (#127280)

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CODEOWNERS

homeassistant/components/qbus/__init__.py

homeassistant/components/qbus/config_flow.py

homeassistant/components/qbus/const.py

homeassistant/components/qbus/coordinator.py

homeassistant/components/qbus/entity.py

homeassistant/components/qbus/manifest.json

homeassistant/components/qbus/quality_scale.yaml

homeassistant/components/qbus/strings.json

homeassistant/components/qbus/switch.py

homeassistant/generated/config_flows.py

homeassistant/generated/integrations.json

homeassistant/generated/mqtt.py

mypy.ini

requirements_all.txt

requirements_test_all.txt

tests/components/qbus/__init__.py

tests/components/qbus/conftest.py

tests/components/qbus/const.py