refactor(systemModules): move hardware --> device/hardware, add function option

system/modules/device/hardware/gpu/nvidia/default.nix

@@ -0,0 +1,51 @@
+{ config, lib, pkgs, ... }:
+
+let
+  gpu = config.systemModules.hardware.gpu;
+  inherit (lib) mkIf mkDefault;
+  inherit (builtins) elem;
+  production = config.boot.kernelPackages.nvidiaPackages.production;
+  # beta = config.boot.kernelPackages.nvidiaPackages.beta;
+in
+
+{
+# TODO: make option to choose nvidia package
+  config = mkIf (elem gpu.type ["nvidia"]) {
+    hardware = {
+      nvidia = {
+        open = mkDefault true;
+        package = production;
+        forceFullCompositionPipeline = true;
+        nvidiaSettings = false;
+        nvidiaPersistenced = true;
+        modesetting.enable = true;
+        powerManagement = {
+          enable = mkDefault true;
+          finegrained = mkDefault false;
+        };
+      };
+      opengl = {
+        extraPackages = with pkgs; [ nvidia-vaapi-driver ];
+        extraPackages32 = with pkgs.pkgsi686Linux; [ nvidia-vaapi-driver ];
+      };
+    };
+    environment.systemPackages = with pkgs; [
+
+      libva
+      libva-utils
+
+      vulkan-loader
+      vulkan-validation-layers
+      vulkan-tools
+      vulkan-extension-layer
+
+      mesa
+
+      nvtopPackages.nvidia
+    ];
+    environment.sessionVariables = {
+      LIBVA_DRIVER_NAME = "nvidia";
+      NVD_BACKEND = "direct";
+    };
+  };
+}