system: add config for networking and hardware

modules/system/hardware/graphics.nix

@@ -0,0 +1,36 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  cfg = config.modules.system.hardware;
+  inherit (cfg) amd nvidia;
+  inherit (lib) mkIf;
+in {
+  config = {
+    hardware = {
+      graphics = {
+        enable = true;
+        extraPackages = with pkgs;
+          mkIf amd.enable [
+            mesa
+            libva
+            vaapiVdpau
+          ];
+      };
+    };
+    nvidia = mkIf nvidia.enable {
+      modesetting.enable = true;
+      open = false;
+      powerManagement = {
+        enable = true;
+        finegrained = false;
+        nvidiaSettings = false;
+        package = config.boot.kernelPackges.nvidiaPackages.beta;
+      };
+    };
+    boot.initrd.kernelModules = mkIf amd.enable ["amdgpu"];
+    services.xserver.videoDrivers = mkIf nvidia.enable ["nvidia"];
+  };
+}