Add account interface

libnymea/interfaces/account.json

@@ -0,0 +1,4 @@
+{
+    "description": "This is used to flag a thing that manages user a user account. It is similar to the gateway interface. For example, if there is a remote API that requires logging in but doesn't really offer any more functionality than that, this account shall be used. Such device classes usually will cause auto-devices implementing the actual features as child devices.",
+    "extends": "connectable"
+}

libnymea/interfaces/gateway.json

@@ -1,3 +1,4 @@
 {
+    "description": "The gateway interface is used for gateway devices like bridges to other networks. For instance Ethernet to ZigBee bridges, Ethernet to RF bridges or similar. Typically such device classes implement the actual functionality in child devices that will auto-appear after successful connection to the gateway/bridge.",
     "extends": "connectable"
 }

libnymea/interfaces/interfaces.qrc

@@ -2,6 +2,7 @@
     <qresource prefix="/interfaces">
         <file>light.json</file>
         <file>dimmablelight.json</file>
+        <file>account.json</file>
         <file>daylightsensor.json</file>
         <file>colortemperaturelight.json</file>
         <file>colorlight.json</file>
@@ -69,5 +70,4 @@
         <file>extendednavigationpad.json</file>
         <file>closablesensor.json</file>
     </qresource>
-    <qresource prefix="/"/>
 </RCC>