feat: import 35 skills from affaan-m/everything-claude-code

- Add 9 agent skills (cc-agent-*)
- Add 10 command skills (cc-cmd-*)
- Add 8 skill files (cc-skill-*)
- Add 8 rule skills (cc-rule-*)
- Update README.md skill count from 225 to 260
- Add new skills to Full Skill Registry
- Add credit to affaan-m in Credits section
- Regenerate skills_index.json

Source: https://github.com/affaan-m/everything-claude-code
Author attribution: affaan-m, version 1.0

skills/cc-cmd-update-docs/SKILL.md

@@ -0,0 +1,38 @@
+---
+name: cc-cmd-update-docs
+description: Update Documentation
+author: affaan-m
+version: "1.0"
+---
+
+# Update Documentation
+
+Sync documentation from source-of-truth:
+
+1. Read package.json scripts section
+   - Generate scripts reference table
+   - Include descriptions from comments
+
+2. Read .env.example
+   - Extract all environment variables
+   - Document purpose and format
+
+3. Generate docs/CONTRIB.md with:
+   - Development workflow
+   - Available scripts
+   - Environment setup
+   - Testing procedures
+
+4. Generate docs/RUNBOOK.md with:
+   - Deployment procedures
+   - Monitoring and alerts
+   - Common issues and fixes
+   - Rollback procedures
+
+5. Identify obsolete documentation:
+   - Find docs not modified in 90+ days
+   - List for manual review
+
+6. Show diff summary
+
+Single source of truth: package.json and .env.example