[Feature] Translate README.md into Chinese version.

[wickdynex]

Summary

There are many Chinese novice programmers who want to get start to use GitHub but can't read pure English docs.So I'd like to write a new file called "README_CN.md" translated the origin file into Chinese version and make a hyperlink to it.

Changes

I would translate this README.md file into Chinese version and add the hyperlink to the origin README.md file.

Additional context

Hope you can permit me to do so, many Chinese beginner can't start to use GitHub because of the pure English environment.If we provide the "introduction-to-github" project a Chinese version's README.md, it's perfect for the Chinese beginners to get touch with this platform.So I wanna lower the barrier for these beginners even reading barrier.

[Giamball]

希望大家能夠允許我這樣做，很多中國初學者因為純英文環境而無法開始使用GitHub。如果我們提供中文版的README.md「introduction-to-github」項目，非常適合中文初學者熟悉這個平台。所以我想降低這些初學者的閱讀障礙。希望大家能夠允許我這樣做，很多中國初學者因為純英文環境而無法開始使用GitHub。如果我們提供中文版的README.md「introduction-to-github」項目，非常適合中文初學者熟悉這個平台。所以我想降低這些初學者的閱讀障礙。

[nillkhan1]

I would translate this README.md file into Chinese version and add the hyperlink to the origin README.md file.