New `modules/printing-scanning.nix` exposes `local.printing.*` and `local.scanning.*` (CUPS drivers, SANE with a Canon BJNP `bjnpHosts` escape hatch, shared Avahi mDNS), all off by default so a consumer opts in and a server gets none of it. Imported from `modules/nixos.nix`.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
