Add GPIO input/outputs to Integrations page, to place them in an Area

Feature Requests
1

I use multiple motion detectors connected via the Pi’s GPIO pins. Originally I had groups for each room (entryway, hallway, etc) and put them into there via groups.yaml

Now that Areas have come along, I’m trying to replace my “room” groups with Areas, since it’s supposed to be faster and better.

But the GPIO sensors don’t show up in the Integrations page – so I can’t add the motion detectors to an Area. Please show them there, and allow adding them to an Area.

Thanks!