Shetland Attack Pony support

[lz1asl]

Device home page: https://www.shetlandattackpony.co.uk/
Manual: https://www.shetlandattackpony.co.uk/online-manual
Repository: https://github.com/furbrain/SAP5

The Bluetooth communication should use DistoX like messages over BLE

[lz1asl]

Will need someone with the device to test https://github.com/lz1asl/CaveSurvey/actions/runs/4327487227#artifacts, lost contact with the author