Folks, DO NOT put other projects' code to our repos.

[coco-lab-2022]

Hey folks (@coco-lab-2022)，

1. Our repos should only host our code. If your code require some external libraries to run, do it in your local environments. In our repos, define the dependency only.

2. It is NOT a good practice to directly change other projects' code to do your work (ethically or engineeringly). You shall restrict your work in your own files.

I am considering to do certain CI (including cloud based build process) later, but would like to bring these two things upfront.