feat: 完成主题切换，语言切换的本地存储

src/i18n/index.ts

@@ -0,0 +1,20 @@
+//语言
+import { lang } from '@/settings/designSetting'
+import { createI18n } from 'vue-i18n' //引入vue-i18n组件
+import { getLocalStorage } from '@/utils/index'
+import { GO_LANG_SELECT } from '@/settings/storageConst'
+import zh from './zh/index'
+import en from './en/index'
+
+const lang_storage = getLocalStorage(GO_LANG_SELECT)
+
+const i18n = createI18n({
+  locale: lang_storage || lang,
+  globalInjection: true,
+  messages: {
+    zh: zh,
+    en: en
+  }
+})
+
+export default i18n