Suggestion: add-on recommendations in settings

還沒有人認領這個 Issue。

VS Code has workspace recommendations, which is a nice way to get a project up and running quickly after cloning a repo. The user is notified of recommended extensions and can quickly install them.

I think it would be nice if the VS Code add-on for LuaLS would support the same. Perhaps settings could be extended with something like:

```json
{
"properties": {
"workspace": {
"recommendations": ["love2d"]
}
}
}
```

And then after installing the LuaLS extension, a window could pop-up showing the recommended add-on(s), to be installed with the click of a button.

首先定位擴充功能資訊清單和與設定相關的進入點，然後確認 VS Code 如何表示工作區擴充功能建議和安裝提示。定義支援的建議格式和提示行為，當建議在複製的工作區中顯示並可安裝時，即表示完成。

由索引模型根據 Issue 內容生成。