docs(day04): 更新README目录结构

修复指针文档链接语法错误,添加结构体、指针、反射和条件语句的目录索引,
完善第4天学习内容的导航结构
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yumaojun03 2026-02-01 18:06:44 +08:00
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# 结构体(2)与指针
+ [Go语言结构体](./struct/README.md)
+ [Go语言指针】【](./pointer/README.md)
+ [Go语言指针](./pointer/README.md)
+ [扩展: Go语言反射](./reflect/README.md)
+ [条件语句](./condition/README.md)