graphical: move nvidia to toplevel, remove

nvidia.nix

@@ -0,0 +1,39 @@
+{
+  lib,
+  config,
+  ...
+}:
+
+let
+  name = "nvidia";
+  cfg = config.nixowos.graphical.${name};
+in
+{
+  options.nixowos.graphical.${name} = {
+    enable = lib.mkEnableOption name;
+  };
+
+  config = lib.mkIf cfg.enable {
+    # enable nvidia drivers (not just for xorg!)
+    services.xserver.videoDrivers = [ "nvidia" ];
+
+    hardware.nvidia = lib.mkDefault {
+      # Nvidia power management. Experimental, and can cause sleep/suspend to fail.
+      # Enable this if you have graphical corruption issues or application crashes after waking
+      # up from sleep. This fixes it by saving the entire VRAM memory to /tmp/ instead
+      # of just the bare essentials.
+      # powerManagement.enable = false;
+
+      # Use the NVidia open source kernel module (not to be confused with the
+      # independent third-party "nouveau" open source driver).
+      # Support is limited to the Turing and later architectures:
+      # https://github.com/NVIDIA/open-gpu-kernel-modules#compatible-gpus
+      # Only available from driver 515.43.04+
+      open = true;
+
+      # Enable the Nvidia settings menu,
+      # accessible via `nvidia-settings`.
+      nvidiaSettings = true;
+    };
+  };
+}