Update recommendations for installing Console Arcs

Currently we have this on the console arcs install page in the installer:


Given this, it would make sense to also have a warning on the Chapter 4 install page telling you to make a backup.

Also, the instructions that you could install to a copy of the game folder might interfere with steam's cloud sync (I'm guessing it would prevent it from working?), so perhaps that recommendation is not the best without added instructions.

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Perhaps the simpler/safest way is to just tell the user to fully delete chapter 4, then re-install the unmodded game. The installer can check whether the game is already modded and show a warning if that is the case. Using this method, we also dont' need to have a preemptive warning on Chapter 4.

Also see https://github.com/07th-mod/python-patcher/issues/129

查看安装程序代码中的控制台弧线安装页面，可能在文档或 UI 文件中。检查第 4 章安装页面是否有类似的警告。需要检查安装程序检测修改版游戏的逻辑，可能在修补程序脚本中。查看关联的 issue #129 以了解上下文。更改涉及更新文本和添加检查。

由索引模型根据 Issue 内容生成。