Expose Alarm as  Switch ON/OFF
I am using NAS-AB02B0  Zigbee Alarm   https://www.zigbee2mqtt.io/devices/NAS-AB02B0.html#neo-nas-ab02b0 
it is supported by Zigbee2Mqqt and can be triggered by MQQT : To write (/set) a value publish a message to topic zigbee2mqtt/FRIENDLY_NAME/set with payload {"alarm": NEW_VALUE}. If value equals true alarm is ON, if false OFF.

This is everything exposed by MQQT"  and I need Switch for "ALARM" with TRUE/FALSE

{
"alarm":false,
"battery_low":false,
"humidity":54,
"humidity_alarm":false,
"humidity_max":80,
"humidity_min":30,
"linkquality":201,
"melody":1,
"power_type":"usb",
"temperature":27.1,
"temperature_alarm":false,
"temperature_max":35,
"temperature_min":10,
"volume":"low"}

**Problem description**
Expose Alarm as Switch in Homebridge 

**Suggested solution**
Expose Alarm as Switch with TRUE/FALSE 

**Describe alternatives you've considered**
I don't have any alternatives for the moment 

**Additional context**
screenshot attached 

**Are you willing to contribute to this feature?**
Yes - i will help , with whatever is necessary . 

<img width="1873" alt="Screenshot 2022-08-23 at 20 23 55" src="https://user-images.githubusercontent.com/41396180/186225082-166f556d-3e6c-4d9c-8b6a-1e2ab697418f.png">

