Implement script support needed for dungeons

Only a few are supported right now
You will need certain script files in ./resources/Scripts

src/main/java/emu/grasscutter/game/entity/EntityBaseGadget.java

@@ -0,0 +1,18 @@
+package emu.grasscutter.game.entity;
+
+import emu.grasscutter.game.world.Scene;
+import emu.grasscutter.game.world.World;
+
+public abstract class EntityBaseGadget extends GameEntity {
+
+	public EntityBaseGadget(Scene scene) {
+		super(scene);
+	}
+	
+	public abstract int getGadgetId();
+	
+	@Override
+	public void onDeath(int killerId) {
+		
+	}
+}