Version 1.0 working Entity creation and string generator

src/app/_models/mqtt-light.ts

@@ -0,0 +1,9 @@
+import { MQTTEntity } from "./mqtt_base";
+
+export class MqttLight extends MQTTEntity {
+    cmd_t: string = "command/topic";
+    bri_cmd_t: string = "brightness/command/topic";
+    pl_on: string = "1";
+    pl_off: string = "0";
+    val_tpl: string = "";
+}