Add support for more accessories

[noelbundick]

Thanks for the integration! Been working great w/ no hassle

The new Timberline / Timberline XL grills support a few extra accessories out of the box, namely an induction cooktop (hob) and a bluetooth probes. These show up under acc, but the type isn't "probe" and properties are slightly different.

Sample snippet pulled from the MQTT topic:

    "acc": [
      {
        "channel": "bt",
        "hob": {
          "fw": "01.00.55",
          "level": 0,
          "get_temp": 35,
          "set_temp": 0,
          "status": 0
        },
        "type": "hob",
        "uuid": "xxxxxxxxxxxx",
        "con": 1
      },
      {
        "channel": "BT0",
        "btprobe": {
          "batt": 8,
          "fw": "XX.YY.ZZ",
          "alarm_fired": 0,
          "get_temp": 129,
          "set_temp": 155,
          "ambient_temp": 1542
        },
        "type": "btprobe",
        "uuid": "xxxxxxxxxxxx",
        "con": 1
      }
    ],

This PR adds support for those additional known-good extra accessories