Make Higurashi console arc install requirements more clear

As the console arcs install over higurashi ep4, if the user already has a modded ep4 the install will fail as the installer stops once it realizes where are already some mod files in the folder.

We should make it more clear what the requirements are to install the console arcs. Could someone fill me in on how this should work?

查看处理模组检测和失败的安装脚本，很可能在主补丁代码中。理解当前的错误信息及其出现位置。然后更新 README 或安装说明，明确指出控制台章节需要一个干净、未安装模组的 Episode 4 版本。

由索引模型根据 Issue 内容生成。