feat(scenic): 添加分享功能配置项

- 在ScenicConfigResp中新增shareEnable字段
- 在AppScenicController中设置shareEnable默认值为true
- 支持景区配置是否开启分享功能
- 保持与shareBeforeBuy配置项的一致性处理

src/main/java/com/ycwl/basic/model/pc/scenic/resp/ScenicConfigResp.java

@@ -50,5 +50,6 @@ public class ScenicConfigResp {
     private Boolean groupingEnable;
     private Boolean showPhotoWhenWaiting;
     private String watermarkUrl;
+    private Boolean shareEnable;
     private Boolean shareBeforeBuy;
 }