Convert usermods from header to library

usermods/Internal_Temperature_v2/Internal_Temperature_v2.cpp

@@ -193,4 +193,7 @@ void InternalTemperatureUsermod::publishMqtt(const char *state, bool retain)
     mqtt->publish(subuf, 0, retain, state);
   }
 #endif
-}
+}
+
+static InternalTemperatureUsermod internal_temperature_v2;
+REGISTER_USERMOD(internal_temperature_v2);

usermods/Internal_Temperature_v2/library.json

@@ -0,0 +1,9 @@
+{
+  "name:": "Internal_Temperature_v2",
+  "build": {
+    "srcDir": ".",
+    "includeDir": "../../wled00",
+    "libLDFMode": "chain+",
+    "libArchive": false
+  }
+}