Merge pull request #18 from pengwon/main

translate to Chinese

Author: cpq

README.md

@@ -3,6 +3,8 @@
 [![License: MIT](https://img.shields.io/badge/license-MIT-blue)](https://opensource.org/licenses/MIT)
 [![Build Status]( https://github.com/cpq/bare-metal-programming-guide/workflows/build/badge.svg)](https://github.com/cpq/bare-metal-programming-guide/actions)
 
+[English](README.md) | [中文](README_zh-CN.md)
+
 This guide is written for developers who wish to start programming
 microcontrollers using GCC compiler and a datasheet - nothing else! The
 fundamentals explained in this guide, will help you understand better how