feat(wms): 添加员工异动管理功能

- 创建员工异动实体类 WmsEmployeeChange，包含异动记录主键、员工信息关联、异动类型等字段
- 定义员工异动业务对象 WmsEmployeeChangeBo 和视图对象 WmsEmployeeChangeVo
- 实现员工异动服务接口 IWmsEmployeeChangeService 及其具体实现类 WmsEmployeeChangeServiceImpl
- 添加员工异动数据访问层 WmsEmployeeChangeMapper 及对应的 MyBatis XML 映射文件
- 开发员工异动控制器 WmsEmployeeChangeController，提供增删改查及导出功能
- 集成分页查询、数据校验、重复提交防护等通用功能

klp-wms/src/main/java/com/klp/mapper/WmsEmployeeChangeMapper.java

@@ -0,0 +1,15 @@
+package com.klp.mapper;
+
+import com.klp.domain.WmsEmployeeChange;
+import com.klp.domain.vo.WmsEmployeeChangeVo;
+import com.klp.common.core.mapper.BaseMapperPlus;
+
+/**
+ * 员工异动（入职/离职）Mapper接口
+ *
+ * @author klp
+ * @date 2026-03-14
+ */
+public interface WmsEmployeeChangeMapper extends BaseMapperPlus<WmsEmployeeChangeMapper, WmsEmployeeChange, WmsEmployeeChangeVo> {
+
+}