refactor: Reorganize repository structure for optimal learning path

Reorder folders based on learning dependencies, complexity, and frequency of use:
- 01-slash-commands (unchanged) - Quick wins for beginners
- 02-memory (was 03) - Essential foundation
- 03-skills (was 05) - Auto-invoked capabilities
- 04-subagents (was 02) - Task delegation
- 05-mcp (was 04) - External integration
- 06-hooks (was 07) - Event automation
- 07-plugins (was 06) - Bundled solutions
- 08-checkpoints (unchanged) - Safe experimentation
- 09-advanced-features (unchanged) - Power user tools

Documentation improvements:
- Add LEARNING-ROADMAP.md with detailed milestones and exercises
- Simplify README.md for better scannability
- Consolidate Quick Start and Getting Started sections
- Combine Feature Comparison and Use Case Matrix tables
- Reorder README sections: Learning Path → Quick Reference → Getting Started
- Update all cross-references across module READMEs

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

07-plugins/devops-automation/scripts/rollback.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+set -e
+
+echo "⏪ Starting rollback..."
+
+ENV=${1:-staging}
+echo "📦 Target environment: $ENV"
+
+# Get previous deployment
+PREVIOUS=$(kubectl rollout history deployment/app -n $ENV | tail -2 | head -1 | awk '{print $1}')
+echo "🔄 Rolling back to revision: $PREVIOUS"
+
+# Execute rollback
+kubectl rollout undo deployment/app -n $ENV
+
+# Wait for rollback
+echo "⏳ Waiting for rollback to complete..."
+kubectl rollout status deployment/app -n $ENV
+
+# Health check
+echo "🏥 Running health checks..."
+sleep 5
+curl -f http://api.$ENV.example.com/health
+
+echo "✅ Rollback complete!"