[docs-linker] workshop docs: add gh-aw doc links

[github-actions]

Summary

This PR adds precise inline hyperlinks to gh-aw documentation for key concepts in 3 workshop files.

Changes by file

workshop/side-quest-06-04-install-local.md

• skill files → Glossary: Skill Files

workshop/side-quest-07-01-compile-workflow.md

• GitHub Actions → GitHub Actions Primer
• compilation → Compilation Process

workshop/side-quest-07d-billing-paths.md

• billing → Billing
• fine-grained PAT → Glossary: Fine-grained Personal Access Token
• AI engines → AI Engines reference

All links were validated against the pre-built doc index. No content was removed; existing links were preserved.

Warning

Firewall blocked 1 domain

The following domain was blocked by the firewall during workflow execution:

• awmgmcpg

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "awmgmcpg"

See Network Configuration for more information.

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• expires on Aug 18, 2026, 6:37 AM UTC