Add comprehensive startup orchestration and phase tracking system

[Copilot]

The repository lacked a unified way to initialize all components and track development progress across the 4-phase roadmap (Q1-Q4 2025).

Changes

Startup Orchestration (start-all-phases.sh)

• Single-command initialization for backend, frontend, and contracts
• Service lifecycle management (start/stop/status) with PID tracking
• Prerequisite validation and automatic dependency installation
• Structured logging to Logs/ directory

Usage:

bash start-all-phases.sh --all      # Initialize all components
bash start-all-phases.sh --status   # Check service health
bash start-all-phases.sh --stop     # Gracefully stop all services

Phase Tracking (PHASE_STATUS.md)

• Granular progress tracking for all 4 development phases
• Checklist-based task management for each phase component
• KPI targets and completion percentages
• Current state: Phase 1 (Foundation) at 95%

Developer Experience

• QUICK_START.md: One-page reference with environment setup templates
• .gitignore: Excludes dependencies, build artifacts, environment files
• Updated README.md with automated startup workflow

All components tested with Node.js v20, dependencies installed successfully, no security issues detected.

Original prompt

Start all Phase

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