use same Builder for sensor specific fields

gateway/include/ha.h

@@ -145,6 +145,21 @@ namespace Ha {
             return static_cast<T*>(cmp);
         }
 
+        Builder& withDeviceClass(const char* value) {
+            cmp->deviceClass = value;
+            return *this;
+        }
+
+        Builder& withUnitMseasure(const char* value) {
+            cmp->unitMeasure = value;
+            return *this;
+        }
+
+        Builder& withValueTemplate(const char* value) {
+            cmp->valueTemplate = value;
+            return *this;
+        }
+
         Builder& withSecondary(Component* c) {
             c->mainDevice = new DeviceConfig{ cmp->id };
             return *this;
@@ -255,10 +270,9 @@ namespace Ha {
     };
 
     struct TemperatureSensor : Sensor {
-        TemperatureSensor(const char* id) : Sensor("Temperature", id) {
+        TemperatureSensor(const char* id, const char* name = "Temperature") : Sensor(name, id) {
             deviceClass = "temperature";
             unitMeasure = "°C";
-            valueTemplate = "{{ value_json.sensor.temperature }}";
         }
     };