feat: consolidate GitHub Actions workflows with unified pipeline

🔄 Replace redundant workflows with intelligent orchestrated pipeline:

✨ New unified pipeline.yml features:
- 🧠 Smart orchestrator determines execution path based on branch/trigger
- 🧪 Matrix testing across all project layers (Domain, Application, Infrastructure, API)
- 🔨 Multi-platform Docker builds with security scanning
- 🎭 Environment-aware deployments (staging for develop, production for main)
- 📊 Comprehensive execution summaries with emoji indicators

🗑️ Removed redundant workflows:
- ci.yml → replaced by pipeline quality-gate job
- docker.yml → replaced by pipeline build-and-publish job
- deploy-staging.yml → replaced by pipeline deploy-staging job
- deploy-production.yml → replaced by pipeline deploy-production job
- deploy.yml → duplicate removed

🎯 Enhanced workflow integration:
- Visual emoji indicators throughout pipeline stages
- Intelligent conditional execution based on context
- Parallel job execution for improved performance
- Standardized error handling and reporting
- Consolidated artifact management

🚀 Generated with [Claude Code](https://claude.ai/code)

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

Author: mapedersen