Hello world support for UDP broadcasts over the LAN on ESP32 (#5779)

* UDP local area network meshing on ESP32

* Logs

* Comment

* Update UdpMulticastThread.h

* Changes

* Only use router->send

src/mesh/wifi/WiFiAPClient.cpp

@@ -112,6 +112,12 @@ static void onNetworkConnected()
         APStartupComplete = true;
     }
 
+#if HAS_UDP_MULTICAST
+    if (udpThread) {
+        udpThread->start();
+    }
+#endif
+
     // FIXME this is kinda yucky, instead we should just have an observable for 'wifireconnected'
 #ifndef MESHTASTIC_EXCLUDE_MQTT
     if (mqtt)
@@ -437,4 +443,4 @@ uint8_t getWifiDisconnectReason()
 {
     return wifiDisconnectReason;
 }
-#endif
+#endif