feat: Add comprehensive cross-IDE workspace utility system
- Add workspace-utils/ directory with 6 comprehensive utility scripts (2600+ lines)
- Implement workspace initialization, status, health monitoring, cleanup, handoff, and sync
- Add npm scripts integration for Node.js projects with standalone fallback
- Create IDE-specific documentation for Cursor, Windsurf, GitHub Copilot
- Add context-manager and handoff-manager for workspace coordination
- Support cross-IDE collaboration with environment detection and session management
- Enable automatic workspace deployment during BMAD installation
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