新增多语言转换 mqtt支持websocket

lib/base/language/extensions/StringExt.dart

@@ -0,0 +1,8 @@
+import '../Language.dart';
+
+extension StringTransform on String {
+  String tr({Map<String, String>? params, String? languageCode}) {
+    return Language.getTranslation(this,
+        params: params, languageCode: languageCode);
+  }
+}