feat: add core entities, controllers, services, and mappers across multi-module project

admin/src/main/java/cn/unizk/mapper/MenuMapper.java

@@ -0,0 +1,12 @@
+package cn.unizk.mapper;
+
+import cn.unizk.entity.po.Menu;
+
+import java.util.List;
+
+public interface MenuMapper extends UniBaseMapper<Menu> {
+
+    List<Menu> selectAdminMenuList();
+
+    List<Menu> selectStoreMenuList();
+}