fix(子弹系统): 修复子弹分裂和折射逻辑并添加调试配置

修复子弹分裂和折射方法未返回子弹实例的问题，确保子弹能正确添加到场景中。同时在Rooster角色中添加非发布环境下的子弹分裂和折射调试配置。

scripts/Contents/Bullets/VectorStar.gd

@@ -19,6 +19,8 @@ func ai():
 func split(newBullet: BulletBase, _index: int, _total: int, _lastBullet: float):
 	if newBullet is VectorStar:
 		newBullet.forwarded = false
+	return newBullet
 func refract(newBullet: BulletBase, _entity: EntityBase, _index: int, _total: int, _lastBullet: float):
 	if newBullet is VectorStar:
 		newBullet.forwarded = false
+	return newBullet