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?

查看處理模組偵測和失敗的安裝腳本，很可能在主修補程式碼中。理解當前的錯誤訊息及其出現位置。然後更新 README 或安裝說明，明確指出控制台章節需要一個乾淨、未安裝模組的 Episode 4 版本。

由索引模型根據 Issue 內容生成。