improve shelf hiearchy

flake.nix

@@ -1,5 +1,5 @@
 {
-  description = "Deno development environment";
+  description = "Grimu-R base";
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
@@ -10,23 +10,16 @@
     flake-utils.lib.eachDefaultSystem (system:
       let
         pkgs = nixpkgs.legacyPackages.${system};
-        denoWorkspace = import ./shelf/deno-workspace.nix {
+        shelf = import ./shelf {
           inherit pkgs system;
-          # collective hash of all deno sources - resulting shared deno cache hash
-          knownDenoHashes = {
-            "UnKGEQo7oF1X5JeWyx7w0oCwqPQ=" =
-              "sha256-7csbrTbGd6J4a0Gkj9ndKhNxv90KeOHjr7DDNal3L4Q=";
-          };
         };
       in
         {
+          packages.shelf = shelf;
           devShells.default = pkgs.mkShell {
             buildInputs = [  ];
             shellHook = ''
-              export DENO_DIR=$PWD/.deno_cache
-              rm -rf $DENO_DIR
-              cp -r ${denoWorkspace} $DENO_DIR
-              chmod -R u+w "$DENO_DIR"
+              ${shelf.setupScript}
             '';
           };
         });