fix: enable gpu offload

modules/nixos/graphics.nix

@@ -17,7 +17,10 @@ in
     # TODO: Move to nvidia module
     hardware.nvidia = {
       open = false;
+      powerManagement.enable = true;
       prime = {
+        offload.enable = true;
+        offload.enableOffloadCmd = true;
         intelBusId = "PCI:0@0:2:0";
         nvidiaBusId = "PCI:1@0:0:0";
       };