Add support for Shelly BLU H&T

[GeoChallenger]

Details of the device: https://shelly-api-docs.shelly.cloud/docs-ble/Devices/ht

Example of current output data
{
"manufacturerdata": "a90b0111000b03000ab54cbdb6c67c",
"name": "SBHT-003C",
"id": "7C:C6:B6:xx:yy:zz",
"rssi": -55,
"servicedatauuid": "fcd2",
"servicedata": "44004e01642e3f45df00",
"mfr": "Allterco Robotics ltd"
}

[DigiH]

I'm currently away and won't be able to look at this for a while.