Add WireGuard VPN usermod (#3270)

* added wireguard VPN usermod

* add example PIO override & edit readme

* add contact information and improve usermod performance

wled00/const.h

@@ -148,6 +148,7 @@
 #define USERMOD_ID_PWM_OUTPUTS           38     //Usermod "usermod_pwm_outputs.h
 #define USERMOD_ID_SHT                   39     //Usermod "usermod_sht.h
 #define USERMOD_ID_KLIPPER               40     // Usermod Klipper percentage
+#define USERMOD_ID_WIREGUARD             41     //Usermod "wireguard.h"
 
 //Access point behavior
 #define AP_BEHAVIOR_BOOT_NO_CONN          0     //Open AP when no connection after boot

wled00/usermods_list.cpp

@@ -133,6 +133,10 @@
   #include "../usermods/wizlights/wizlights.h"
 #endif
 
+#ifdef USERMOD_WIREGUARD
+  #include "../usermods/wireguard/wireguard.h"
+#endif
+
 #ifdef USERMOD_WORDCLOCK
   #include "../usermods/usermod_v2_word_clock/usermod_v2_word_clock.h"
 #endif
@@ -306,6 +310,10 @@ void registerUsermods()
   usermods.add(new WizLightsUsermod());
   #endif
 
+  #ifdef USERMOD_WIREGUARD
+  usermods.add(new WireguardUsermod());
+  #endif
+
   #ifdef USERMOD_WORDCLOCK
   usermods.add(new WordClockUsermod());
   #endif