split battery level into 2

libnymea/interfaces/battery.json

@@ -1,11 +1,5 @@
 {
     "states": [
-        {
-            "name": "batteryLevel",
-            "type": "int",
-            "minValue": 0,
-            "maxValue": 100
-        },
         {
             "name": "batteryCritical",
             "type": "bool"

libnymea/interfaces/batterylevel.json

@@ -0,0 +1,11 @@
+{
+    "extends": "battery",
+    "states": [
+        {
+            "name": "batteryLevel",
+            "type": "int",
+            "minValue": 0,
+            "maxValue": 100
+        }
+    ]
+}

libnymea/interfaces/interfaces.qrc

@@ -14,6 +14,7 @@
         <file>mediametadataprovider.json</file>
         <file>mediaplayer.json</file>
         <file>battery.json</file>
+        <file>batterylevel.json</file>
         <file>button.json</file>
         <file>simplebutton.json</file>
         <file>longpressbutton.json</file>