add hyprland modules

modules/hyprland/system.nix

@@ -0,0 +1,48 @@
+{ config, pkgs, ... }:
+
+{
+  # Enable Hyprland
+  programs.hyprland = {
+    enable = true;
+    xwayland.enable = true;
+  };
+
+  # Display manager: greetd + tuigreet
+  services.greetd = {
+    enable = true;
+    settings = {
+      default_session = {
+        command = "${pkgs.tuigreet}/bin/tuigreet --time --cmd Hyprland";
+        user = "greeter";
+      };
+    };
+  };
+
+  # XDG portals for screen sharing, file picker, etc.
+  xdg.portal = {
+    enable = true;
+    extraPortals = [
+      pkgs.xdg-desktop-portal-hyprland
+      pkgs.xdg-desktop-portal-gtk
+    ];
+    config.common.default = ["*"];
+  };
+
+  # Configure touchpad settings
+  services.libinput = {
+    enable = true;
+    touchpad = {
+      naturalScrolling = true;
+      tapping = false;
+      disableWhileTyping = true;
+    };
+  };
+
+  # System packages for Hyprland
+  environment.systemPackages = with pkgs; [
+    hyprland
+    hypridle
+    hyprlock
+    tuigreet
+  ];
+}