docs: add Review PR shorthand command to Squad Commands (#133)

[mpaulosky]

Closes #133

Changes

• Add Review PR #{N} shorthand → routes to Aragorn (equivalent to Aragorn review PR #{N})
• Add Aragorn review sequence callout documenting Critical Rules chore: add copyright headers to all .cs files #7 & feat(ci): Phase 1-2 — label automation + CodeQL security scanning #8
• Update Common Sequences section to use the shorthand

Testing

• Docs-only change
• Follows existing docs/ formatting conventions

Checklist

• Code follows conventions
• Documentation updated

[github-actions]

🏗️ PR Added to Squad Triage Queue

This PR has been labeled with squad and added to the triage queue.

Next steps:

• The squad Lead will review and assign to an appropriate team member
• A squad:member label will be added after triage

If you know which squad member should handle this, you can add the appropriate squad:member label yourself.

[Copilot]

Pull request overview

Updates the Squad command reference to add a shorthand PR review command that routes to Aragorn and to document Aragorn’s full review sequence, aligning the “Common Sequences” examples with the new shorthand.

Changes:

• Add Review PR #{N} shorthand command (equivalent to Aragorn review PR #{N}).
• Add a callout describing Aragorn’s review sequence aligned to Critical Rules #7 and #8.
• Update “Common Sequences” to use the new shorthand.

[github-actions]

Test Results Summary

206 tests  ±0   206 ✅ ±0   14s ⏱️ ±0s
  5 suites ±0     0 💤 ±0 
  5 files   ±0     0 ❌ ±0 

Results for commit 0d153bb. ± Comparison against base commit b79a12e.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.93%. Comparing base (b79a12e) to head (0d153bb).
⚠️ Report is 1 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #134   +/-   ##
=======================================
  Coverage   76.93%   76.93%           
=======================================
  Files          43       43           
  Lines         672      672           
  Branches      111      111           
=======================================
  Hits          517      517           
  Misses        105      105           
  Partials       50       50           

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