用 /create-canvas 给 Copilot 搭一块共享画布:自定义工作流实战原文:GitHub Blog - 《GitHub Copilot app for beginners: How to build custom workflows with canvases》(https://github.blog/ai-and-ml/github-copilot/github-copilot-app-for-beginners-how-to-build-custom-workflows-with-canvases)