Add an alert interface

libnymea/interfaces/alert.json

@@ -0,0 +1,8 @@
+{
+    "description": "Used for things that have some sort of alert. For instance, light bulbs may be able to blink on alert actions, or speaker might be able to play an alert sound. ZigBee devices for example oftion provide alert actions to identify themselves.",
+    "actions": [
+        {
+            "name": "alert"
+        }
+    ]
+}

libnymea/interfaces/interfaces.qrc

@@ -1,5 +1,6 @@
 <RCC>
     <qresource prefix="/interfaces">
+	<file>alert.json</file>
         <file>light.json</file>
         <file>dimmablelight.json</file>
         <file>daylightsensor.json</file>
@@ -69,5 +70,4 @@
         <file>extendednavigationpad.json</file>
         <file>closablesensor.json</file>
     </qresource>
-    <qresource prefix="/"/>
 </RCC>