[docs] Update documentation for features from 2026-05-02

[github-actions]

Documentation Updates - 2026-05-02

This PR updates the documentation based on features merged in the last 24 hours.

Features Documented

• features.copilot-requests feature flag for GitHub Actions token auth for Copilot (from fix: remove --ignore-scripts for crush install and add crush --version step #29735 batch)
• app: → github-app: codemod migration added to upgrading guide

📝 Detailed Changes & References

Changes Made

• Updated docs/src/content/docs/reference/frontmatter.md to add a new Copilot Requests (features.copilot-requests) section documenting the private-preview feature flag that enables GitHub Actions token auth for Copilot, including its three compiler behaviors and a usage example.
• Updated docs/src/content/docs/guides/upgrading.md to add app: → github-app: to the list of typical codemod migrations.

Merged PRs Referenced

• fix: remove --ignore-scripts for crush install and add crush --version step #29735 (batch commit) — includes minor-rename-app-to-github-app, patch-add-copilot-requests-feature, and many other changes

Features Reviewed and Already Documented

• status-comment decoupled from ai-reaction — already documented in frontmatter.md
• sandbox: false → sandbox.agent: false — already documented in sandbox.md and upgrading.md
• preserve-branch-name: true in create-pull-request — already documented in safe-outputs-pull-requests.md
• MCP Gateway OTLP headers as string-only — already documented in mcp-gateway.md
• configure_gh_for_ghe.sh GHE support — already documented in cli.md
• firewall-audit-logs artifact — already documented in artifacts.md
• gh aw audit diff subcommand — deprecated hidden subcommand, users should use gh aw audit <base> <compare> instead
• gh aw audit report — removed in v0.66.1, already noted in cli.md

Skipped Issues

No open documentation issues could be checked in this run (GitHub CLI commands require approval in the current environment).

Notes

The features.copilot-requests flag is noted as private preview. The documentation accurately reflects what's in the glossary entry and the changeset description.

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• expires on May 3, 2026, 11:03 AM UTC