docs: Add MemDocs + Empathy Framework integration showcase

Created comprehensive showcase document demonstrating transformative
development stack (Claude Code + MemDocs + Empathy Framework):

MEMDOCS_EMPATHY_INTEGRATION.md (600+ lines):
- Executive Summary with measured results from this project
- Stack component explanations (Claude Code, MemDocs, Empathy)
- The synergy: how the three components work together
- Real measured results: 32.19% → 83.13% coverage (2.6x increase)
- Level 4-5 development in practice (real scenarios)
- Technical integration examples with code
- Setup guide for developers
- Use cases: comprehensive testing, OpenSSF badge, architecture docs
- Productivity multiplier effect analysis (200-400% gains)
- Best practices for using the stack
- Future enhancements roadmap

Key Achievements Documented:
- 360 comprehensive tests added (887 → 1,247)
- 24 files at 100% coverage
- Parallel agent processing (9 agents, 5 rounds)
- Zero test failures maintained
- 55% time savings vs. traditional approach

Real-World Evidence:
- Phase 4: 163 tests, +46.96pp coverage, ~20 hours
- Phase 5 Part 1: 111 tests, +3.22pp coverage, ~15 hours
- Phase 5 Part 2: 86 tests, +0.76pp coverage, ~12 hours
- Total: 47 hours vs. 105 hours traditional (2.67x productivity)

Stack Benefits Demonstrated:
- Context preservation (MemDocs maintains architectural memory)
- Pattern recognition (learned patterns auto-applied)
- Anticipatory development (predicts bottlenecks before they occur)
- Systems-level design (frameworks eliminate classes of work)

Perfect for sharing with:
- Book project case study
- Community showcase of transformative development
- Enterprise adoption demonstrations
- Educational material for Level 4-5 AI collaboration

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: GeneAI