feat: add GitHub workflow skills for PR enrichment and collaboration

[yordis]

No description provided.

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

A new "gh" plugin was added to the marketplace configuration, providing a GitHub workflow skill for enriching pull request descriptions with contextual information, related issues, and reviewer mentions. Accompanying documentation outlines the six-step enrichment workflow and quality checks.

Changes

Cohort / File(s)	Summary
Plugin Marketplace Configuration .claude-plugin/marketplace.json	Added new "gh" plugin entry to the plugins array with description for GitHub workflow skills and reference to the gh-enrich-pr-description skill.
Skill Documentation skills/gh-enrich-pr-description/SKILL.md	New skill document detailing a six-step workflow for enriching PR descriptions: gathering context, investigating root causes, finding related issues/PRs, identifying reviewers, composing description structure, and applying changes. Includes quality checks and command examples.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 A plugin hops into the marketplace with glee,
To enrich PRs with context for all to see,
With workflow skills and steps so clear,
GitHub collaboration just got better here! ✨

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch add-gh-enrich-pr-desc

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