Add Chinese (Simplified) translations for command descriptions

[devadvance]

This issue is to add Chinese (Simplified) translations for the existing commands found in https://github.com/devadvance/terminalcheatsheet/tree/staging/_data/commands

Use zh-CN (the locale code for Chinese (Simplified)) as the key for the strings.

Please comment on this issue before starting work so people are informed that you are working on it.

[NickCwh]

Hi @devadvance I can take this on as well :)

[NickCwh]

@devadvance would you be interested in the translation for Korean and Bahasa Malaysia as well?