feat(i18n): Add Tencent App Store zh-Hans translations

- Add zh-Hans translations for Tencent App Store(腾讯应用宝) in the multilingual files
- Update the display name for Tencent App Store to use localized translations

lib/app_sources/tencent.dart

@@ -1,11 +1,12 @@
 import 'dart:convert';
 
+import 'package:easy_localization/easy_localization.dart';
 import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/providers/source_provider.dart';
 
 class Tencent extends AppSource {
   Tencent() {
-    name = 'Tencent App Store';
+    name = tr('tencentAppStore');
     hosts = ['sj.qq.com'];
     naiveStandardVersionDetection = true;
     showReleaseDateAsVersionToggle = true;