HA integration: Import powerplugs as switches

[marcelveldt]

Context: home-assistant/core#82883 (comment) and home-assistant/core#105917

Proposal: Import on/off relays and powerplugs by default as switch entity, allowing the user to decide if it should become a light (switch to light helper) or just a switch. Maybe even create both

[Gonioul]

Other integrations allow plugs to be set as fans or ac, It should be the same for Hue.