Refactor package dependencies for ai-engine component

[anchapin]

Summary

Current setup uses direct imports instead of proper package dependencies for the ai-engine component.

Location

setup.py:35

Context

# Note: For MVP, we maintain the current structure with direct imports
# TODO: Refactor to proper package dependency when ai-engine is packaged
"sentence-transformers",

Requirements

• Package ai-engine as a proper Python package
• Update setup.py to use package dependencies instead of direct imports
• Ensure proper version management and dependency resolution
• Update documentation for new package structure
• Test installation and imports after refactoring

Priority

Low - Architecture improvement, not blocking current functionality