message: doc: add logo
diff: +<p align="center">
  + <a href="https://surgio.royli.dev/" target="_blank">
  + <img width="180" src="https://raw.githubusercontent.com/geekdada/surgio/master/docs/.vuepress/public/surgio-icon.png" alt="logo">
  + </a>
  +</p>
  +
  [![NPM version][npm-image]][npm-url]
  [![build status][travis-image]][travis-url]
  [![Build Status][azure-image]][azure-url]
  