a few more compile-time infos about enabled/disabled features

helps to understand what you'll get

wled00/wled_serial.cpp

@@ -229,6 +229,8 @@ void handleSerial()
   //#ifdef WLED_DEBUG
     if ((millis() - startTime) > SERIAL_MAXTIME_MILLIS) { USER_PRINTLN(F("handleSerial(): need a break after >100ms of activity.")); }
   //#endif
+  #else
+    #pragma message "Serial protocols (AdaLight, Serial JSON, Serial LED driver) disabled"
   #endif
 
   // If Continuous Serial Streaming is enabled, send new LED data as bytes