新增接口：调查问卷

src/main/java/com/ai/da/model/vo/QuestionnaireVO.java

@@ -0,0 +1,57 @@
+package com.ai.da.model.vo;
+
+import lombok.Data;
+import java.util.List;
+
+@Data
+public class QuestionnaireVO {
+    /**
+     * 用户名
+     */
+    private String userName;
+    /**
+     * 用户性别
+     */
+    private String gender;
+    /**
+     * 职业
+     */
+    private String occupation;
+    /**
+     * 国家
+     */
+    private String country;
+    /**
+     * 电子邮件
+     */
+    private String email;
+    /**
+     * 年龄区间
+     */
+    private String age;
+    /**
+     * How has AiDA been helpful to you?
+     */
+    private List<String> helpful;
+    /**
+     * What do you think AiDA should improve?
+     */
+    private List<String> improve;
+    /**
+     *  Will you subscribe to AiDA 3.0
+     */
+    private String isSubscribe;
+    /**
+     * If NO, please share why:
+     */
+    private List<String> reasonForNotSubscribe;
+    /**
+     *  Are you currently using any design tools?
+     */
+    private String designTools;
+    /**
+     * 用户所选语言
+     */
+    private String language;
+
+}