refactor(national-motion-system):重构课程相关实体和DTO

- 移除了 AppCourses 实体中的部分字段
- 新增了 AppCoursesCuDTO 和 AppCoursesRuleDTO 两个 DTO 类
- 优化了课程信息的结构，提高了代码的可维护性和扩展性

national-motion-module-system/national-motion-system-biz/src/main/java/org/jeecg/modules/system/app/service/impl/AppOrderServiceImpl.java

@@ -25,12 +25,6 @@ import javax.annotation.Resource;
  */
 @Service
 public class AppOrderServiceImpl extends ServiceImpl<AppOrderMapper, AppOrder> implements IAppOrderService {
-    @Resource
-    AppOrderProductMapper appOrderProductMapper;
-    @Resource
-    AppInsureNumberMapper appInsureMapper;
-    @Resource
-    AppOrderUserMapper appOrderUserMapper;
 
     @Override
     @Transactional(rollbackFor = Exception.class)