Add Jovian back again to try it out

hosts/jupiter/default.nix

@@ -0,0 +1,28 @@
+{ lib, jovian, ... }:
+{
+  imports = [
+    ./boot
+    ./disko
+    ./filesystems
+    ./hardware
+    ./network
+    ./users
+    ../../modules/system
+  ];
+
+  networking = {
+    hostName = "jupiter";
+    wireless.enable = true;
+  };
+
+  system = {
+    desktop.enable = true;
+    stateVersion = "24.05";
+  };
+
+  jovian = {
+    steam.enable = true;
+    hardware.has.amd.gpu = true;
+    decky-loader.enable = true;
+  }
+}