Use Core.System.Configuration.Install as an alternative for System.Configuration.Install

Hi, I am creating a installer for my app, I want to custom the installation progress and I use .NET 8.0, so I found your repo and use it as an alternative for System.Configuration.Install
I follow the old docs (https://learn.microsoft.com/en-us/previous-versions/visualstudio/visual-studio-2010/9cdb5eda(v=vs.100) but retrieve error `installerclass property is only valid for assemblies. build process cancelled`
My goal is create a textbox for user, then can take that input to next progress.
I stuck with it for a long time, please, ... help me

未識別任何原始程式檔或測試。先在比較儲存庫行為與連結的舊版 Microsoft 文件時，重現 `installerclass property is only valid for assemblies` 錯誤；當 .NET 8 安裝程式能夠收集文字方塊輸入並將其傳遞給下一個安裝進度步驟時，即表示完成。

由索引模型根據 Issue 內容生成。