Log a warning when setting max packet size fails

src/main.cpp

@@ -72,7 +72,9 @@ void setup() {
   client.setKeepAlive(10);
   client.enableLastWillMessage("hotdog/availability", "offline", true);
   client.enableDebuggingMessages();
-  client.setMaxPacketSize(2048);
+  if (!client.setMaxPacketSize(1024)) {
+    Serial.println("Failed to set max packet size");
+  }
 
   shadeRepository.addShadeAddedCallback([] (Shade& shade) {
     // Only add shade if client is already connected