feat: support i18n

Signed-off-by: RobotHuang <1183598761@qq.com>

web/src/i18n.js

@@ -0,0 +1,39 @@
+// Copyright 2021 The casbin Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import i18n from 'i18next'
+import zh from './locales/zh.json'
+import en from './locales/en.json'
+
+const resources = {
+  en: en,
+  zh: zh
+};
+
+i18n
+  .init({
+    lng: "en",
+
+    resources: resources,
+
+    keySeparator: false,
+
+    interpolation: {
+      escapeValue: false
+    },
+    
+    saveMissing: true,
+  })
+
+export default i18n;