integrating docs about "devices" namespace

docs/reference.md

@@ -26,11 +26,11 @@ control.inBackground(() => {
 ## Advanced
 
 ```namespaces
-bluetooth.onBluetoothConnected(() => {
-    
-});
+devices.tellCameraTo(MesCameraEvent.TakePhoto);
+bluetooth.onBluetoothConnected(() => {});
 ```
 
 ```package
+microbit-devices
 microbit-bluetooth
 ```

docs/reference/devices.md

@@ -0,0 +1,19 @@
+# Devices
+
+Control a phone with the BBC micro:bit via Bluetooth.
+
+```cards
+devices.tellCameraTo(MesCameraEvent.TakePhoto);
+devices.tellRemoteControlTo(MesRemoteControlEvent.play);
+devices.raiseAlertTo(MesAlertEvent.DisplayToast);
+devices.onNotified(MesDeviceInfo.IncomingCall, () => {
+    
+});
+devices.onGamepadButton(MesDpadButtonInfo.ADown, () => {
+    
+});
+devices.signalStrength();
+devices.onSignalStrengthChanged(() => {
+    
+});
+```