feat: search suggestion switch

lib/utils/global_data_cache.dart

@@ -47,6 +47,8 @@ class GlobalDataCache {
   UserInfoData? userInfo;
   // 搜索历史
   late List historyCacheList;
+  //
+  late bool enableSearchSuggest = true;
 
   // 私有构造函数
   GlobalDataCache._();
@@ -108,5 +110,7 @@ class GlobalDataCache {
     userInfo = userInfoCache.get('userInfoCache');
     sheetHeight = localCache.get('sheetHeight', defaultValue: 0.0);
     historyCacheList = localCache.get('cacheList', defaultValue: []);
+    enableSearchSuggest =
+        setting.get(SettingBoxKey.enableSearchSuggest, defaultValue: true);
   }
 }

lib/utils/storage.dart

@@ -107,6 +107,7 @@ class SettingBoxKey {
       replySortType = 'replySortType',
       defaultDynamicType = 'defaultDynamicType',
       enableHotKey = 'enableHotKey',
+      enableSearchSuggest = 'enableSearchSuggest',
       enableQuickFav = 'enableQuickFav',
       enableWordRe = 'enableWordRe',
       enableSearchWord = 'enableSearchWord',