Add ThrownEggHatchEvent

Adds a new event similar to PlayerEggThrowEvent, but without the Player requirement
(dispensers can throw eggs to hatch them, too).

paper-server/patches/sources/net/minecraft/world/entity/projectile/ThrownEgg.java.patch

@@ -48,7 +48,7 @@
      }
  
      @Override
-@@ -52,30 +58,58 @@
+@@ -52,30 +58,65 @@
      protected void onHit(HitResult hitResult) {
          super.onHit(hitResult);
          if (!this.level().isClientSide) {
@@ -83,6 +83,13 @@
 +                    }
 +                }
 +                // CraftBukkit end
++                // Paper start - Add ThrownEggHatchEvent
++                com.destroystokyo.paper.event.entity.ThrownEggHatchEvent event = new com.destroystokyo.paper.event.entity.ThrownEggHatchEvent((org.bukkit.entity.Egg) getBukkitEntity(), hatching, b0, hatchingType);
++                event.callEvent();
++                hatching = event.isHatching();
++                b0 = hatching ? event.getNumHatches() : 0; // If hatching is set to false, ensure child count is 0
++                hatchingType = event.getHatchingType();
++                // Paper end - Add ThrownEggHatchEvent
 +
                  for (int i = 0; i < b0; ++i) {
 -                    Chicken entitychicken = (Chicken) EntityType.CHICKEN.create(this.level(), EntitySpawnReason.TRIGGERED);