nixos: Modularize NixOS and Home Manager config

modules/system/graphics.nix

@@ -0,0 +1,10 @@
+{pkgs, ... }: 
+{
+  hardware.graphics = {
+  enable = true;
+  enable32Bit = true;
+  extraPackages = with pkgs; [
+    rocmPackages.clr.icd
+  ];
+  };
+}