- Move overlays.nix into packages/overlays.nix with dynamic pattern
- Update flake.nix to use packagesModule from import-tree
- Delete centralized packages.nix (packages are now self-contained)
The packages directory is now fully self-contained with each package
exporting its own flake output and overlays auto-including all packages.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
