[WIP] Setup Cangjie toolchain and validate Skills examples

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

language 目录下是仓颉语言特性文档。 libs 目录下是仓颉标准库（std）和扩展标准库（stdx）文档。 tools 目录下是仓颉工具链文档。 目前我们基于这些文档，为 AI 工具写了一套仓颉 Skills，放在 skills 目录中。现在请完成如下任务：

下载仓颉 1.0.5 版本工具链：https://drive.usercontent.google.com/download?id=1MLNv8DTEMS43Xto6c5e0HeAv7Z6Nt2dx&export=download&authuser=1&confirm=t&uuid=117dd2d8-2bb5-4d49-b2a5-854beb851306&at=AGN2oQ1PTEN69fBE02h1VYKUJpb3%3A1772899895703，然后参考 skills 相关指导学会怎么配置使用这套工具链，只用学会 cjc 和 cjpm 常用命令即可。

配置好仓颉工具链后，请编译运行验证各 SKILL.md 中每个示例代码是否正确，如有错误请修复。

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