docs: add comprehensive CONFIGURATION.md and examples CLI command

Add consumer-friendly documentation and interactive help:
- CONFIGURATION.md: Complete guide covering nodes, search, FTS indexes
- Examples command: Practical examples for all CLI commands
- Focus on implemented features only (SQLite-based)
- Include configuration change impact warnings

🤖 Generated with [Amplifier](https://github.com/microsoft/amplifier)

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

Author: dluc