feat: add asus-numpad package and module

pkgs/all-packages.nix

@@ -2,4 +2,5 @@ final: prev: {
   enigma = prev.callPackage ./enigma.nix {};
   vineflower = prev.callPackage ./vineflower.nix {};
   koi = prev.kdePackages.callPackage ./koi.nix {};
+  asus-numpad = prev.callPackage ./asus-numpad.nix {};
 }

pkgs/asus-numpad.nix

@@ -0,0 +1,36 @@
+{
+  lib,
+  fetchFromGitHub,
+  rustPlatform,
+  pkg-config,
+  libevdev,
+}:
+rustPlatform.buildRustPackage {
+  pname = "asus-numpad";
+  version = "unstable-2024-09-15";
+
+  src = fetchFromGitHub {
+    owner = "iamkroot";
+    repo = "asus-numpad";
+    rev = "e78875c1f4c58e06199737f4ef5c6f48ac7cb21b";
+    hash = "sha256-5FqM80zUDucDA0VocJ7ODmKAC6gcd9QwBOHVVKa6iMI=";
+  };
+
+  cargoHash = "sha256-O7Iu+ugJ81suh0a09jApyiWwxbo/RGaFW7aiZKnWQUE=";
+
+  nativeBuildInputs = [
+    pkg-config
+  ];
+
+  buildInputs = [
+    libevdev
+  ];
+
+  meta = with lib; {
+    mainProgram = "asus-numpad";
+    description = "Linux driver for Asus laptops to activate numpad on touchpad";
+    homepage = "https://github.com/iamkroot/asus-numpad";
+    license = licenses.mit;
+    platforms = platforms.linux;
+  };
+}