feat(product): 新增键盘商品管理模块

新增商品实体、Mapper、Service、Controller 及 VO，支持商品列表、详情、订阅等接口；同步更新 Sa-Token 放行路径与 .gitignore

src/main/java/com/yolo/keyborad/mapper/KeyboardProductItemsMapper.java

@@ -0,0 +1,12 @@
+package com.yolo.keyborad.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.yolo.keyborad.model.entity.KeyboardProductItems;
+
+/*
+* @author: ziin
+* @date: 2025/12/12 13:44
+*/
+    
+public interface KeyboardProductItemsMapper extends BaseMapper<KeyboardProductItems> {
+}