refactor(graphics): add amdgpu_top to systempackages

modules/nixos/graphics.nix

@@ -5,11 +5,13 @@
   hardware.graphics = {
     enable = true;
     enable32Bit = true;
-    extraPackages = with pkgs; [
-      amdgpu_top
-    ];
   };
+
+  # install amdgpu_top
+  environment.systemPackages = with pkgs; [
+    amdgpu_top
+  ];
   
-  # sets boot.initrd.kernelModules = amdgpu
+  # add amdgpu to the initrd for plymouth
   hardware.amdgpu.initrd.enable = true;
 }