feat(mp): 新增小程序用户数据传输对象

src/main/java/com/link/hub/pojo/mp/dto/MpUserDto.java

+package com.link.hub.pojo.mp.dto;
+
+import lombok.Data;
+
+@Data
+public class MpUserDto  {
+
+    /**
+     * 主键ID
+     */
+     private Long id;
+
+    /**
+     * 小程序用户唯一标识
+     */
+    private String openid;
+
+    /**
+     * 微信开放平台统一标识
+     */
+    private String unionid;
+
+    /**
+     * 用户昵称
+     */
+    private String nickname;
+
+}

src/main/java/com/link/hub/service/officeAccount/WechatOfficeAccountService.java

+package com.link.hub.service.officeAccount;
+
+public interface WechatOfficeAccountService {
+    Boolean isSubscribe(String openid);
+}