Feat mono topic

What does this MR do and why?

Close gitlab#4500 (closed)

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

How to set up and validate locally

1. 按 安装步骤 完成 Mono client 的安装

2. 手动将 mono 分支切换为当前 MR 的 BRANCH

   $ cd .repo/repo/ && git checkout BRANCH && cd -