- Move package from pkgs/games/asc/default.nix to pkgs/by-name/as/asc/package.nix
- Update fetchFromGitHub to use `hash` instead of `sha256`
- Drop local `with lib` block; reference `lib.licenses`, `lib.maintainers`, and `lib.platforms` explicitly
- Remove top-level all-packages.nix entry; by-name layout exposes `pkgs.asc` automatically