Project Docs Builder v0.1.0

Initial public release of Project Docs Builder.\n\nIncludes:\n- Codex skill entrypoint and UI metadata.\n- Full project documentation pack structure for Lite, Full, and Enterprise levels.\n- Detailed document templates for product, requirements, architecture, UX, delivery, engineering, and AI docs.\n- Intake/routing rules and quality gates.\n- Python scaffold helper for docs-pack skeleton generation.\n- MIT license, README, changelog, and version metadata.