OpenPetCam: pan/tilt pet camera app on top of Thingino (WireGuard + WebRTC + detection on a VPS)

[crimeacs]

Thanks for Thingino. It made this possible. OpenPetCam uses a Thingino camera's RTSP stream, the motor HTTP API
and the WireGuard client to build a pet camera that finds and follows the dog. Tested on a Cinnado D1 (T23N,
ATBM6012B). The camera notes cover the quirks we hit: inverted tilt commands, CGIs that only parse compact JSON, and
prudynt freezing after a streamer restart, at https://github.com/crimeacs/OpenPetCam/blob/main/docs/camera-thingino.md

If anyone tries it on another pan/tilt model, I'd like to add it to the supported list.