docs(cn): translate content/docs/design-principles.md into Chinese (#145)

* half done

* done

* fix

* remove english

* Update content/docs/design-principles.md

Co-Authored-By: Yuqing Chen <mr.chenyuqing@live.com>

* Update content/docs/design-principles.md

Co-Authored-By: Yuqing Chen <mr.chenyuqing@live.com>

* Update content/docs/design-principles.md

Co-Authored-By: Yuqing Chen <mr.chenyuqing@live.com>

* Update content/docs/design-principles.md

Co-Authored-By: Yuqing Chen <mr.chenyuqing@live.com>

* Update content/docs/design-principles.md

Co-Authored-By: Yuqing Chen <mr.chenyuqing@live.com>

* Update content/docs/design-principles.md

Co-Authored-By: Yuqing Chen <mr.chenyuqing@live.com>

* Update content/docs/design-principles.md

Co-Authored-By: Yuqing Chen <mr.chenyuqing@live.com>

* Update content/docs/design-principles.md

Co-Authored-By: Yuqing Chen <mr.chenyuqing@live.com>

* Update content/docs/design-principles.md

Co-Authored-By: Yuqing Chen <mr.chenyuqing@live.com>

* Update content/docs/design-principles.md

Co-Authored-By: QiChang Li <github@liqichang.com>

* Update content/docs/design-principles.md

Co-Authored-By: Yuqing Chen <mr.chenyuqing@live.com>

* fix

* fix

* Update content/docs/design-principles.md

Co-Authored-By: Yuqing Chen <mr.chenyuqing@live.com>

* docs(cn): fix docs issue

* docs(cn): fix 错误 -> 出现错误

Author: thjttk