Build and publish cx-stacks .deb package

[mikejmorgan-ai]

Summary

Package cx-stacks Python module as .deb for apt repository.

Requirements

• Build workflow for cx-stacks (LAMP, Node, Django stack deployment)
• Package name: cx-stacks
• Dependencies: cx-core, python3-yaml, python3-docker

Acceptance Criteria

• apt install cx-stacks works
• cx-stacks deploy lamp functional after install
• Integrates with cx-core CLI