refactor: 项目代码重构，优化管理系统代码细节

src/main/resources/mapper/SysDictMapper.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.youlai.system.mapper.SysDictMapper">
+
+</mapper>