Run Copilot code review on GitHub-hosted runners

[rtBot]

This repository is public, so Copilot code review cannot use rtCamp self-hosted Actions Runner Controller scale sets, which are not exposed to public repositories.

Adds .github/workflows/copilot-code-review.yml, which pins Copilot code review to ubuntu-latest. The file takes precedence over copilot-setup-steps.yml and over the organization-level runner type for Copilot code review only; Copilot cloud agent keeps using the organization configuration.

No dependencies are installed: Copilot clones the repository and provisions what it needs itself. Repository-specific setup steps can be added to this file later if a review needs extra tooling.

Docs: https://docs.github.com/en/copilot/how-tos/copilot-on-github/set-up-copilot/configure-runners

[changeset-bot]

⚠️ No Changeset found

Latest commit: 88e626d

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR