Make it clearer that the project uses `yarn` rather than `npm`

Hello,
It is my first time working with npm and I was trying to install the correct packages in order to work on this issue: https://github.com/code-chronicles-code/leetcode-curriculum/issues/305

but I kept on getting this error

However, I was able to resolve it by changing all the eslint versions to "^8". Did you face a similar issue by any chance?

檢視此處描述的安裝情境和連結的 issue #305，然後找出專案目前在哪裡說明其套件管理器工作流程。明確說明 Yarn 是必要的，並確認文件中的安裝路徑能避免所回報的 npm 與 ESLint 混淆。

由索引模型根據 Issue 內容生成。