Feature/english (#381)

* perf[navbar]: set langSelect to component && refine errorLog component

* feat[login]:add 18n to login form

* fix[pagination]: fixed when selected page-sizes

* perf[i18n]:dashboard document svg permission

* perf[charts]: perf effect

* perf[i18n]:excel && zip

* perf[i18n]: table && errorLog && theme

* perf[i18n]: components

* perf[i18n]: direct use $t

* perf[i18n]: complex-table

* update README.md

* update README.md 📘

* perf[i18n]: refine code comments

src/views/example/table/dynamicTable/index.vue

@@ -1,9 +1,9 @@
 <template>
   <div class="app-container">
-    <div style='margin:0 0 5px 20px'>固定表头 按照表头顺序排序</div>
+    <div style='margin:0 0 5px 20px'>{{$t('table.dynamicTips1')}}</div>
     <fixed-thead></fixed-thead>
 
-    <div style='margin:30px 0 5px 20px'>不固定表头 按照点击顺序排序</div>
+    <div style='margin:30px 0 5px 20px'>{{$t('table.dynamicTips2')}}</div>
     <unfixed-thead></unfixed-thead>
   </div>
 </template>