add My9291 light bulb driver (#2599)

Co-authored-by: Christian Schwinne <dev.aircoookie@gmail.com>

wled00/usermods_list.cpp

@@ -120,6 +120,10 @@
 #include "../usermods/usermod_v2_word_clock/usermod_v2_word_clock.h"
 #endif
 
+#ifdef USERMOD_MY9291
+#include "../usermods/MY9291/usermode_MY9291.h"
+#endif
+
 void registerUsermods()
 {
 /*
@@ -223,8 +227,12 @@ void registerUsermods()
   #ifdef USERMOD_WIZLIGHTS
   usermods.add(new WizLightsUsermod());
   #endif
-
+  
   #ifdef USERMOD_WORDCLOCK
   usermods.add(new WordClockUsermod());
   #endif
+
+  #ifdef USERMOD_MY9291
+  usermods.add(new MY9291Usermod());
+  #endif
 }