vanadium/home: remove packages I don't use

shell.nix

@@ -4,6 +4,7 @@ in
 {
   pkgs ? import sources.nixpkgs {
     overlays = map import [
+      ./nix/overlays/agenix.nix
       ./nix/overlays/disko.nix
       ./nix/overlays/npins.nix
       ./nix/packages/overlay.nix
@@ -18,8 +19,10 @@ pkgs.mkShell {
   packages =
     with pkgs;
     [
+      agenix # from agenix repo
       npins # from npins repo
       disko # from disko flake
+      stow
       manage
       nixos-anywhere # comes from nixpkgs
     ]