Implemented pig zombie get/set anger functions.

By: Celtic Minstrel <celtic.minstrel.ca@>

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftPigZombie.java

@@ -11,9 +11,30 @@ public class CraftPigZombie extends CraftZombie implements PigZombie {
         super(server, entity);
     }
 
+    @Override
+    public EntityPigZombie getHandle() {
+        return (EntityPigZombie) super.getHandle();
+    }
+
     @Override
     public String toString() {
         return "CraftPigZombie";
     }
 
+    public int getAnger() {
+        return getHandle().angerLevel;
+    }
+
+    public void setAnger(int level) {
+        getHandle().angerLevel = level;
+    }
+
+    public void setAngry(boolean angry) {
+        setAnger(angry ? 400 : 0);
+    }
+
+    public boolean isAngry() {
+        return getAnger() > 0;
+    }
+
 }