Add comprehensive MVP completion assessment and work breakdown for MAVIS

[Copilot]

This PR provides a thorough analysis of how close MAVIS is to completion for its Phase 1 MVP, addressing the request to assess project readiness.

Assessment Summary

Overall Completion: 60-70% - The project has excellent foundations but requires significant work in GUI rendering and Windows shell integration to reach MVP status.

Key Findings

Strengths ✅

• Solid Architecture: Well-designed modular workspace with 32 Rust files (~4,168 lines of code)
• Complete Infrastructure: Configuration system with hot-reloading, comprehensive Lua scripting engine, robust resource monitoring
• Professional Standards: Proper error handling, documentation, and Rust best practices

Critical Gaps ⚠️

• GUI Rendering: Direct2D backend not implemented - only placeholder ImGui integration
• Shell Integration: Windows registry manipulation missing - core shell replacement functionality incomplete
• Terminal UI: ConPTY framework exists but no actual terminal interface
• Build Issues: Project doesn't compile due to Linux dependencies in Windows-only codebase

Documentation Added

1. docs/mvp_completion_assessment.md - Detailed 7,000+ word analysis covering:

   • Component-by-component completion status
   • Phase 1 MVP requirements mapping
   • Critical blockers and technical debt analysis
   • Recommendations for reaching MVP

2. docs/mvp_work_breakdown.md - Comprehensive work plan including:

   • Critical path tasks with effort estimates
   • Technical implementation details for each component
   • Risk assessment and mitigation strategies
   • 6-8 week timeline to MVP completion

3. docs/mvp_summary.md - Executive summary with:

   • Visual progress indicators
   • Quick reference completion percentages
   • Architecture strengths and critical blockers

Timeline to MVP

Estimated: 6-8 weeks of focused development

Critical path items (4-5 weeks):

• Fix build system (1-2 days)
• Implement GUI rendering with Direct2D (1-2 weeks)
• Complete Windows shell registration (1 week)
• Add terminal and LF integration (1 week)

The assessment provides a clear roadmap for transforming the well-architected framework into a functional Windows shell replacement that meets all Phase 1 requirements.

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