Add tentative github copilot support

[yimingli]

Add tentative support to Github Copilot according to https://docs.github.com/en/copilot/customizing-copilot/adding-custom-instructions-for-github-copilot?tool=vscode

[grapeot]

I think this is very helpful. Thanks a lot. I have two quick questions.

The first is, I'm curious, did you do any exploration on using this tool in Copilot? How does it feel compared with Cursor?

The second is, if you want to maximize the impact of this PR, I would suggest to:

• A. Also update the README to mention it also supports Copilot.
• B. Also modify the template branch so that we could deploy Copilot-specific projects in Cookiecutter.

But it's up to you. The current form of this PR is also good enough for development. We could expand it in future PRs.

[grapeot]

Looks good! Merged!

[yimingli]

Updated the readme. GitHub copilot's agent mode was released to public beta just a few days ago. It's quite unreliable at this point. For example, it constantly stuck at command line execution, and it can't reliably debug itself using the error code.

[yimingli]

Haven't worked with cookiecutter before, but taking a look.

[grapeot]

Updated the readme. GitHub copilot's agent mode was released to public beta just a few days ago. It's quite unreliable at this point. For example, it constantly stuck at command line execution, and it can't reliably debug itself using the error code.

Thanks! The info is very helpful!