refactor(nixos): move usb config to its own module

modules/nixos/hardware/default.nix

@@ -24,33 +24,10 @@ in
     };
     gpu = lib.pantheon.mkStrOption;
     platform = lib.pantheon.mkStrOption;
-    usb = {
-      automount = mkEnableOption "";
-    };
   };
 
   config = lib.mkMerge [
-    (mkIf cfg.usb.automount {
-      services.udisks2.enable = true;
-      home-manager.sharedModules = singleton {
-        services.udiskie = {
-          enable = true;
-          automount = true;
-          notify = true;
-        };
-      };
-    })
     {
-      hardware.keyboard.qmk.enable = true;
-      services.udev = {
-        packages = with pkgs; [
-          vial
-          via
-          qmk
-          qmk-udev-rules
-          qmk_hid
-        ];
-      };
       services.fwupd.enable = true;
       persistDirs = singleton "/var/lib/bluetooth";
       hardware.bluetooth = {

modules/nixos/hardware/usb/default.nix

@@ -0,0 +1,46 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+let
+  inherit (lib)
+    mkEnableOption
+    mkIf
+    mkMerge
+    singleton
+    ;
+  cfg = config.hardware.usb;
+in
+{
+  options.hardware.usb = {
+    automount = mkEnableOption "";
+    enableQmk = mkEnableOption "";
+  };
+
+  config = mkMerge [
+    (mkIf cfg.automount {
+      services.udisks2.enable = true;
+      home-manager.sharedModules = singleton {
+        services.udiskie = {
+          enable = true;
+          automount = true;
+          notify = true;
+        };
+      };
+    })
+    (mkIf cfg.enableQmk {
+      hardware.keyboard.qmk.enable = true;
+      services.udev = {
+        packages = with pkgs; [
+          vial
+          via
+          qmk
+          qmk-udev-rules
+          qmk_hid
+        ];
+      };
+    })
+  ];
+}

systems/x86_64-linux/desktop.nix

@@ -10,4 +10,9 @@
     terminal.ghostty.enable = true;
     window-manager.hyprland.enable = true;
   };
+
+  hardware.usb = {
+    automount = true;
+    enableQmk = true;
+  };
 }

systems/x86_64-linux/nemesis/default.nix

@@ -17,7 +17,6 @@
     };
     platform = "amd";
     gpu = "nvidia";
-    usb.automount = true;
   };
 
   desktop = {