feat(子弹): 添加紫色水晶子弹的爆炸效果和销毁逻辑

refactor(子弹基类): 重构销毁逻辑防止重复调用
fix(敌人): 调整小鸡boss的出现波次和激光音效
style(场景文件): 整理动画资源顺序

scripts/Statemachine/EffectController.gd

@@ -15,3 +15,12 @@ func shot():
 	if oneShot:
 		await cloned.finished
 		cloned.queue_free()
+
+static func create(scene: PackedScene, spawnPosition: Vector2, parent: Node2D = null) -> EffectController:
+	var cloned = scene.instantiate() as EffectController
+	cloned.global_position = spawnPosition
+	if parent:
+		parent.add_child(cloned)
+	else:
+		WorldManager.rootNode.add_child(cloned)
+	return cloned