Add support for `Keypad` sensor type

[XaF]

Sensor information

• type: Keypad
• Home Assistant device class: TBD!!!
• Panel sends sensor status updates?
  • Yes, I can see the Open/Close messages (I have been able to capture ZONE_ACTIVE messages)
  • No, it seems to only tell us the sensor exists, but never update its state

Decision

Will add / Won't add ? TBD

Qolsys Events for the sensor

ZONE_INFO

{
  "id": "374-5234",
  "type": "Keypad",
  "name": "Upstairs Keypad",
  "group": "fixedintrusion",
  "status": "Closed",
  "state": "0",
  "zone_id": 31,
  "zone_physical_type": 4,
  "zone_alarm_type": 0,
  "zone_type": 104,
  "partition_id": 0
}

{
  "id": "IQR1",
  "type": "Keypad",
  "name": "IQ Remote 1",
  "group": "fixedintrusion",
  "status": "Closed",
  "state": "0",
  "zone_id": 48,
  "zone_physical_type": 4,
  "zone_alarm_type": 0,
  "zone_type": 104,
  "partition_id": 0
}

ZONE_UPDATE

N/A

ZONE_ACTIVE

N/A

[halfordfan]

I doubt I can help with the code, but I'm a willing tester. My panel is set up on a test bench for the next few weeks.