feat(admin): implement category management functionality

- Added AddCategoryReqVO for category creation with validation
- Created AdminCategoryController with endpoints for add, list, delete and select operations
- Implemented AdminCategoryService interface and its methods
- Added Category entity with JPA annotations and logical delete support
- Created CategoryRepository extending JpaRepository with custom query methods
- Added SQL table creation script for t_category with indexes and constraints
- Implemented PageResponse utility for handling paginated results
- Added FindCategoryPageListReqVO and FindCategoryPageListRspVO for pagination
- Included DeleteCategoryReqVO for category deletion requests
- Updated Jackson configuration to ignore unknown properties
- Added base page query model and user info response VO
- Fixed typo in response code enum for user not exist error

weblog-module-common/src/main/java/com/hanserwei/common/enums/ResponseCodeEnum.java

@@ -16,7 +16,9 @@ public enum ResponseCodeEnum implements BaseExceptionInterface {
     LOGIN_FAIL("20000", "登录失败"),
     USERNAME_OR_PWD_ERROR("20001", "用户名或密码错误"),
     UNAUTHORIZED("20002", "无访问权限，请先登录！"),
-    FORBIDDEN("20004", "演示账号仅支持查询操作！")
+    FORBIDDEN("20004", "演示账号仅支持查询操作！"),
+    USER_NOT_EXIST("2005", "有户不存在！"),
+    CATEGORY_NAME_IS_EXISTED("20005", "该分类已存在，请勿重复添加！")
     ;
 
     // 异常码