### 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

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

Issue Number: close #188 

Problem:
利用doxygen将代码注释生成文档

### What is changed and how it works?
修改github action，增加doxygen生成文档，并gihtub pages部署发布

### Other information

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

使用doxygen生成代码文档

Problem:
doxygen可以很方便的把代码注释转换成文档，但是当前没有利用这个功能

### What is changed and how it works?
增加了doxyfile，并在github action的workflow中增加了这个功能

### Other information