feat(templates): use nixbuild/nix-quick-install-action in vanilla template

Replace DeterminateSystems installer with nixbuild/nix-quick-install-action
to align with main flake actions configuration.

Author: DivitMittal

home/ai/workflows.nix

@@ -20,6 +20,10 @@
 
     ## Memory System (Issue Tracker)
     inherit (pkgs) beads;
+    bead = pkgs.writeShellScriptBin "bd" ''
+      exec ${pkgs.pnpm}/bin/pnpm dlx @beads/bd "$@"
+    '';
+
     inherit (pkgs.custom) bv-bin;
   };
 }

templates/vanilla/flake/actions/default.nix

@@ -35,7 +35,10 @@
           persist-credentials = false;
         };
       }
-      inputs.actions-nix.lib.steps.DeterminateSystemsNixInstallerAction
+      {
+        name = "Install Nix";
+        uses = "nixbuild/nix-quick-install-action@master";
+      }
       {
         name = "Magic Nix Cache(Use GitHub Actions Cache)";
         uses = "DeterminateSystems/magic-nix-cache-action@main";