Add killWholeStackOnDeath setting to the API

UltimateStacker/src/main/java/com.craftaro.ultimatestacker/settings/Settings.java

@@ -297,4 +297,9 @@ public class Settings implements com.craftaro.ultimatestacker.api.Settings {
     public int getMaxItemStackSize() {
         return MAX_STACK_ITEMS.getInt();
     }
+
+    @Override
+    public boolean killWholeStackOnDeath() {
+        return KILL_WHOLE_STACK_ON_DEATH.getBoolean();
+    }
 }

UltimateStackerAPI/src/main/java/com/craftaro/ultimatestacker/api/Settings.java

@@ -7,5 +7,7 @@ public interface Settings {
      */
     int getMaxItemStackSize();
 
+    boolean killWholeStackOnDeath();
+
 
 }