feat: 增加sn管理接口

src/main/java/com/youlai/boot/device/mapper/LocationMapper.java

@@ -0,0 +1,12 @@
+package com.youlai.boot.device.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.youlai.boot.device.model.entity.SnLocation;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 设备定位Mapper
+ */
+@Mapper
+public interface LocationMapper extends BaseMapper<SnLocation> {
+}