feat: add AI-First Principles knowledge synthesis system

- Add principles loader, searcher, synthesizer, and knowledge extractor
- Extract 454 concepts, 8 patterns, and 8 insights from 11 principles
- Build knowledge graph with 493 nodes and 814 edges
- Add CLI commands for principles and knowledge management
- Create persistent knowledge storage in amplifier/data/knowledge
- Add comprehensive documentation and tests
- Enable context-aware recommendations and task synthesis

This integration provides intelligent access to AI-First Principles
knowledge through both CLI and Python APIs, helping guide development
decisions with extracted concepts, patterns, and insights.

🤖 Generated with Claude Code

Co-Authored-By: Claude <[email protected]>

Author: michaeljabbour