docs: 更新CLAUDE.md - 添加文档查找说明
添加查找文档时使用绝对路径的说明,指向当前项目目录的docs目录
🤖 Generated with [Claude Code](https://claude.com/claude-code)
via [Happy](https://happy.engineering)
Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>