docs: Complete Wake Intelligence rebranding and v3.0.0 documentation

Comprehensive documentation updates for repository rename and v3.0.0 release.

REPOSITORY RENAME:
- Old: context-mcp-server
- New: semantic-wake-intelligence-mcp
- Reflects evolution to production-ready temporal intelligence system

README.md UPDATES:
- Added prominent "Wake Intelligence Brain Architecture" section
- Detailed breakdown of all 3 layers (Past/Present/Future)
- ASCII art visualization of temporal intelligence flow
- Feature categorization by layer
- Updated description emphasizing 3-layer brain
- Comprehensive use case examples for each layer

ARCHITECTURE.md (NEW):
- Complete technical documentation for all 3 layers
- Layer 1: Causality Engine algorithms and database schema
- Layer 2: Memory Manager tier classification and LRU tracking
- Layer 3: Propagation Engine composite scoring and prediction
- Hexagonal architecture explanation with diagrams
- Data flow examples with step-by-step breakdowns
- Complete database schema with all 4 migrations
- Dependency graph and design principles
- Testing strategy and performance considerations

MIGRATION.md (NEW):
- Step-by-step migration guide for repository rename
- Instructions for updating git remotes
- Package consumer guidance (npm/pnpm/yarn)
- MCP client configuration updates
- CI/CD pipeline updates
- Troubleshooting section
- Timeline and thank you message

CHANGELOG.md UPDATES:
- Added v3.0.0 release notes with complete Layer 3 details
- Documented all PropagationService features
- Listed all new MCP tools (update_predictions, get_high_value_contexts, etc.)
- Database migration history
- Deployment information
- "Wake Intelligence Brain - Complete!" section

PACKAGE.JSON UPDATES:
- Version bump: 2.0.0 → 3.0.0
- Enhanced description emphasizing 3-layer brain architecture
- Updated keywords: causality-engine, memory-manager, propagation-engine, etc.
- Added model-context-protocol, predictive-prefetch, causal-chains, lru-cache
- Reflects production-ready status

FILES MODIFIED:
- README.md (major rewrite with brain architecture focus)
- CHANGELOG.md (v3.0.0 release notes)
- package.json (v3.0.0, enhanced description/keywords)

FILES CREATED:
- ARCHITECTURE.md (comprehensive technical documentation)
- MIGRATION.md (repository rename guide)

NEXT STEPS FOR USERS:
1. Update git remotes to new repository name
2. Review ARCHITECTURE.md for technical deep-dive
3. Check MIGRATION.md for upgrade instructions
4. Read CHANGELOG.md for v3.0.0 release highlights

🧠 Wake Intelligence Brain: Past → Present → Future

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

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

Author: semanticintent