chore: update document for layout 🐶

docs/.vuepress/config.js

@@ -10,6 +10,7 @@ module.exports = {
     repo: 'iczer/vue-antd-admin',
     docsDir: 'docs',
     editLinks: true,
+    smoothScroll: true,
     nav: [
       {text: '指南', link: '/'},
       {text: '配置', link: '/develop/'},
@@ -48,5 +49,9 @@ module.exports = {
     ],
     nextLinks: true,
     prevLinks: true,
+  },
+  plugins: ['@vuepress/back-to-top'],
+  markdown: {
+    lineNumbers: true
   }
 }

docs/.vuepress/styles/palette.styl

@@ -1 +1,2 @@
 $accentColor = #1890ff
+$contentWidth = 940px