[side-quest] Extract GitHub Actions basics primer into optional side quest

[github-actions]

Caution

Protected files were modified in this change.
This pull request is in request_review mode and requires explicit human scrutiny before merge.

Protected files: README.md

What changed

Source file mined: workshop/04-github-actions-intro.md (Step 4 — "GitHub Actions in 5 Minutes")

This step already flagged itself as skippable for experienced learners ("Already know GitHub Actions? Confirm these three statements and skip ahead"), but the runner explainer and full primitives walkthrough were embedded inline as a <details> block, with no standalone route for learners who do want the deeper primer without reading the whole step.

Side quest extracted: workshop/side-quest-04-01-actions-basics.md — "GitHub Actions Basics — Triggers, Jobs, Runners, and Steps." It walks through the workflow file anatomy, the annotated hello-workflow.yml example, and the runner explainer (GitHub-hosted vs self-hosted) as a self-contained, focused primer.

Routing changes:

• workshop/04-github-actions-intro.md keeps the annotated example and the "Label a sample workflow" exercise on the main path (nothing needed for the exercise was removed), but the runner <details> explainer was replaced with a short one-line summary plus an Optional Side Quest callout pointing to the new file.
• The new side quest ends with a return link back to Step 4.
• workshop/README.md adds the new side quest to the Optional Side Quests section, noting it branches from Step 4.

No other workshop files were changed. The main learning path for Step 4 is preserved — learners who skip the side quest still get everything needed to complete the step's checkpoint.

Warning

Firewall blocked 1 domain

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

• registry.npmjs.org

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

network:
  allowed:
    - defaults
    - "registry.npmjs.org"

See Network Configuration for more information.

Generated by 🗺️ Side Quest · copilot · auto · 129 AIC · ⌖ 12.9 AIC · ⊞ 7.7K · ◷

• expires on Sep 13, 2026, 1:50 PM UTC

[github-actions]

Protected files were modified in this pull request and require manual scrutiny before merge.

Please verify that each protected-file change is intentional, policy-compliant, and safe:

• Protected files: README.md

[github-actions]

This pull request was automatically closed because it expired on 2026-09-13T13:50:15.468Z.

Closed by Workflow