- Add packages/beads and packages/gastown with shared definitions
- Expose custom-beads and custom-gastown in flake packages output
- Consolidate CI from matrix (8 parallel jobs) to single job with loop
- Saves ~12 minutes of redundant nix-setup time per run
- Uses ::group:: for collapsible log sections per package
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
