Add support for Keg and Airlock to Plaato using polling API (#34760)

.coveragerc

homeassistant/components/plaato/__init__.py

homeassistant/components/plaato/binary_sensor.py

homeassistant/components/plaato/config_flow.py

homeassistant/components/plaato/const.py

homeassistant/components/plaato/entity.py

homeassistant/components/plaato/manifest.json

homeassistant/components/plaato/sensor.py

homeassistant/components/plaato/strings.json

homeassistant/components/plaato/translations/en.json

requirements_all.txt

requirements_test_all.txt

tests/components/plaato/__init__.py

tests/components/plaato/test_config_flow.py