refactor: remove Docker configuration files - transitioning to native deployment
- Remove Dockerfile for CLI multi-stage build
- Remove docker-compose.yml with 20+ service definitions
- Remove containerized deployment infrastructure (blockchain, consensus, network nodes)
- Remove plugin ecosystem services (registry, marketplace, security, analytics)
- Remove global infrastructure and AI agent services
- Remove monitoring stack (Prometheus, Grafana) and nginx reverse proxy
- Remove database services
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