### What problem were solved in this pull request?

Problem:
当前生成的github pages不太整洁方便，可以优化一下

### What is changed and how it works?
改用mdbook生成文档，并整理文档目录，调整链接

* fix -Wunused-function

* 调整文档格式

使用 Windows WSL Ubuntu + VSCODE 开发调试MiniOB