Dev Container for GitHub Copilot CLI with Codespaces, etc

[asw101]

Describe the feature or problem you'd like to solve

Add a Dev Container for GitHub Copilot CLI with Codespaces, etc

Proposed solution

I've been doing plenty of work with terminal coding agents inside of GitHub Codespaces recently and I'd like to propose having a Codespace / Dev Container in this repo that allows folks to spin up a Codespace that has GitHub Copilot CLI pre-installed which I can run inside VS Code, especially via Terminals in Editor Area.

Example prompts or workflows

No response

Additional context

No response

[RyanHecht]

We've definitely talked about setting up copilot as a devcontainer feature -- thanks for the feedback!

[bk-one]

any progress on this? I would also love to have a simple devcontainer feature and not adjust my dev Dockerfile with the required steps.

[MikeEvansLarah]

+1 a devcontainer feature would be great. We've got existing devcontainers configured across multiple projects and would like to easily light up the Copilot CLI in them.

[Odame]

Here https://github.com/devcontainers/features/tree/main/src/copilot-cli