This commit series completes a major infrastructure overhaul:
- Migrate from manual GitHub Actions YAML to nix-actions workflow generation
- Add automated dependency update workflow with scheduled runs
- Add comprehensive Nix package definitions for all components (atlantis, sorcerer, archivist, etc.)
- Create containerized builds with proper Docker support
- Wrap scripts inside nix for better dependency management and shellcheck
The build system now uses pure Nix expressions for both local development
and CI/CD, providing better reproducibility and maintainability.
