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/model/BasePageQuery.java

@@ -0,0 +1,16 @@
+package com.hanserwei.common.model;
+
+import lombok.Data;
+
+@Data
+public class BasePageQuery {
+    /**
+     * 当前页码, 默认第一页
+     */
+    private Long current = 1L;
+    /**
+     * 每页展示的数据数量，默认每页展示 10 条数据
+     */
+    private Long size = 10L;
+}
+