Include motion switch for Protect Sensor
**Is your feature request related to a problem? Please describe:**
I was hoping to be able to configure my Protect Sensor so the motion sensor will activate when my alarm is set to Away, and it will deactivate when my alarm is set to Home.

**Describe the solution you'd like:**
I believe the simplest solution is to Include a motion switch for Protect Sensors. This allows the sensor to be used in other cases, making this implementation a bit more flexible.

With a motion switch I can activate/deactivate it when the alarm state changes, solving the original issue.

**Describe alternatives you've considered:**
It might also be possible to include a feature option to enable/disable sensors based off of alarm status, however that makes this solution less flexible for other users.

**Additional context:**
I'm assuming inserting [this code](https://github.com/hjdhjd/homebridge-unifi-protect/blob/ea1c878b621c5e4bbb6cf1c0f32ce8cd70793b9e/src/protect-accessory.ts#L212-L222) (or something similar) in to the [protect-sensor.ts file](https://github.com/hjdhjd/homebridge-unifi-protect/blob/ea1c878b621c5e4bbb6cf1c0f32ce8cd70793b9e/src/protect-sensor.ts#L74) would work, but I'm not 100% certain.
