[Doc] add Internationalization document (#321)

* fix: Tabbar icon line-height

* [new feature] progress add showPivot prop

* [new feature] TabItem support vue-router

* [new feature] update document header style

* [Doc] add toast english ducoment

* [bugfix] Search box-sizing wrong

* [Doc] update vant-demo respo

* [Doc] translate theme & demo pages

* [Doc] add Internationalization document

docs/src/doc.config.js

@@ -49,6 +49,11 @@ module.exports = {
                 title: '示例页面',
                 noDocument: true,
                 noExample: true
+              },
+              {
+                path: '/i18n',
+                title: '国际化',
+                noExample: true
               }
             ]
           }
@@ -316,6 +321,11 @@ module.exports = {
                 title: 'Demo pages',
                 noDocument: true,
                 noExample: true
+              },
+              {
+                path: '/i18n',
+                title: 'Internationalization',
+                noExample: true
               }
             ]
           }