Version 1.0 working Entity creation and string generator

src/app/_models/mqtt-switch.ts

@@ -0,0 +1,8 @@
+import { DEVICE_CLASS, MQTTEntity } from "./mqtt_base";
+
+export class MqttSwitch extends MQTTEntity {
+    dev_cla: DEVICE_CLASS = 0
+    cmd_t: string = "command/topic";
+    pl_on: string = "1";
+    pl_off: string = "0";
+}