feat: add navigation plugin, closed #180

docs/zh-cn/plugins.md

@@ -103,3 +103,70 @@ Medium's 风格的图片缩放插件. 基于 [medium-zoom](https://github.com/fr
 ## 在 Github 上编辑
 
 在每一页上添加 `Edit on github` 按钮. 由第三方库提供, 查看 [document](https://github.com/njleonzhang/docsify-edit-on-github)
+
+
+## Copy to Clipboard
+
+Add a simple `Click to copy` button to all preformatted code blocks to effortlessly allow users to copy example code from your docs. Provided by [@jperasmus](https://github.com/jperasmus)
+
+```html
+<link rel="stylesheet" href="//unpkg.com/docsify-copy-code/styles.css">
+<script src="//unpkg.com/docsify-copy-code/index.js"></script>
+```
+
+```javascript
+window.$docsify = {
+  plugins: [
+    window.DocsifyCopyCodePlugin.init()
+  ]
+}
+```
+
+See [here](https://github.com/jperasmus/docsify-copy-code/blob/master/README.md) for more details.
+
+
+
+## Disqus
+
+Disqus comments. https://disqus.com/
+
+```html
+<script>
+  window.$docsify = {
+    disqus: 'shortname'
+  }
+</script>
+<script src="//unpkg.com/docsify/lib/plugins/disqus.min.js"></script>
+```
+
+
+## Gitalk
+
+[Gitalk](https://github.com/gitalk/gitalk) is a modern comment component based on Github Issue and Preact. 
+
+```html
+<link rel="stylesheet" href="//unpkg.com/gitalk/dist/gitalk.css">
+
+<script src="//unpkg.com/docsify/lib/plugins/gitalk.min.js"></script>
+<script src="//unpkg.com/gitalk/dist/gitalk.min.js"></script>
+<script>
+  const gitalk = new Gitalk({
+    clientID: 'Github Application Client ID',
+    clientSecret: 'Github Application Client Secret',
+    repo: 'Github repo',
+    owner: 'Github repo owner',
+    admin: ['Github repo collaborators, only these guys can initialize github issues'],
+    // facebook-like distraction free mode
+    distractionFreeMode: false
+  })
+</script>
+```
+
+## Navigation
+
+Pagination for docsify. By [@imyelo](https://github.com/imyelo)
+
+```html
+<script src="//unpkg.com/docsify/lib/docsify.min.js"></script>
+<script src="//unpkg.com/docsify-pagination/dist/docsify-pagination.min.js"></script>
+```