[deep-report] Docs: replace beginner-hostile `< /path/to/token.txt` with an echo-pipe in Quick Start

[github-actions]

Description

The Quick Start secret-setup steps tell a brand-new user to run gh secret set COPILOT_GITHUB_TOKEN < /path/to/token.txt. A complete beginner does not know what /path/to/token.txt means, how to create it, or where to put it — the docs-noob tester got stuck exactly here. Verified in docs/src/content/docs/setup/quick-start.mdx:

• Line 81: gh secret set COPILOT_GITHUB_TOKEN < /path/to/token.txt
• Line 87: gh secret set ANTHROPIC_API_KEY < /path/to/key.txt

Suggested approach

Use the more intuitive echo-pipe form (and keep the GitHub-UI alternative), e.g.:

echo "ghp_YourTokenHere" | gh secret set COPILOT_GITHUB_TOKEN

Expected Impact

Removes the first real stumbling block in onboarding; the token-setup step becomes copy-pasteable without inventing a file.

Suggested Agent

Docs maintenance agent (e.g. Daily Documentation Updater) or a general code agent.

Estimated Effort

Fast (< 30 min).

Data Source

DeepReport 2026-06-18; Documentation Noob Test Report #39985 (Critical #1). Distinct from the open PAT-acronym item (#39814).

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• expires on Jun 20, 2026, 8:03 AM UTC-08:00