Add documentation for device/interview API (#2777)

* Add documentation for device/interview API

* Update mqtt_topics_and_messages.md

docs/guide/usage/mqtt_topics_and_messages.md

@@ -359,6 +359,11 @@ See [OTA updates](./ota_updates.md).
 Allows to manually trigger a re-configure of the device. Should only be used when the device is not working as expected (e.g. not reporting certain values), not all devices can be configured (only when the definition has a `configure` in its [definition](https://github.com/Koenkk/zigbee-herdsman-converters/blob/master/devices)). Allowed payloads are `{"id": "deviceID"}` or `deviceID` where deviceID can be the `ieee_address` or `friendly_name` of the device. Example; request: `{"id": "my_remote"}` or `my_remote`, response: `{"data":{"id": "my_remote"},"status":"ok"}`.
 
 
+#### zigbee2mqtt/bridge/request/device/interview
+
+Allows you to manually trigger an interview for a specified device, causing zigbee2mqtt to reads its endpoints, clusters, and basic attributes. A device interview usually only occurs after the initial pairing, but it is sometimes useful to perform an interview after a firmware upgrade adds new functionality. Payload format is `{"id": "deviceID"}` where deviceID can be the `ieee_address` or `friendly_name` of the device, example: `{"id": "my_bulb"}`, response: `{"data":{"id": "my_bulb"},"status":"ok"}`. 
+
+
 #### zigbee2mqtt/bridge/request/device/options
 
 Allows you to change device options on the fly. Existing options can be changed or new ones can be added. Payload format is `{"id": deviceID,"options": OPTIONS}` where deviceID can be the `ieee_address` or `friendly_name` of the device, example: `{"id": "my_bulb", "options":{"transition":1}}`. Response will be `{"data":{"from":{"retain":false},"to":{"retain":false,"transition":1},"id":"my_bulb","restart_required":false},"status":"ok"}`. Some options may require restarting Zigbee2MQTT, in this case `restart_required` is set to `true`. Note that `restart_required` is also published to `zigbee2mqtt/bridge/info`. Use `zigbee2mqtt/bridge/request/restart` to restart Zigbee2MQTT.