Fixing stairway usermod and adding buildflags

Fixing Stairway:
missing setup function

Adding builflags:
USERMOD_STAIRCASE_WIPE to install the usermod

wled00/const.h

@@ -151,6 +151,7 @@
 #define USERMOD_ID_WIREGUARD             41     //Usermod "wireguard.h"
 #define USERMOD_ID_INTERNAL_TEMPERATURE  42     //Usermod "usermod_internal_temperature.h"
 #define USERMOD_ID_LDR_DUSK_DAWN         43     //Usermod "usermod_LDR_Dusk_Dawn_v2.h"
+#define USERMOD_ID_STAIRWAY_WIPE         44     //Usermod "stairway-wipe-usermod-v2.h"
 
 //Access point behavior
 #define AP_BEHAVIOR_BOOT_NO_CONN          0     //Open AP when no connection after boot

wled00/usermods_list.cpp

@@ -201,6 +201,9 @@
 #include "../usermods/LDR_Dusk_Dawn_v2/usermod_LDR_Dusk_Dawn_v2.h"
 #endif
 
+#ifdef USERMOD_STAIRCASE_WIPE
+#include "../usermods/stairway_wipe_basic/stairway-wipe-usermod-v2.h"
+#endif
 void registerUsermods()
 {
 /*
@@ -380,4 +383,8 @@ void registerUsermods()
   #ifdef USERMOD_LDR_DUSK_DAWN
   usermods.add(new LDR_Dusk_Dawn_v2());
   #endif
+
+  #ifdef USERMOD_STAIRCASE_WIPE
+  usermods.add(new StairwayWipeUsermod());
+  #endif
 }