🚚 [shared] Added shared config that shared desktop config inherits from

shared/desktop/modules/nix-helper.nix

@@ -0,0 +1,14 @@
+# Nix-Helper: github.com/viperML/nh
+{ common, ... }:
+
+{
+  programs.nh = {
+    enable = true;
+    flake = common.root;
+    clean = {
+      enable = true;
+      dates = "weekly";
+      extraArgs = "--keep-since 30d";
+    };
+  };
+}