feat(hyprland): add hyprland to nixos modules and set relevant nvidia settings

modules/nixos/desktop/default.nix

@@ -0,0 +1,10 @@
+{ config, lib, ... }:
+{
+  imports = [
+    ./windowManager.nix
+  ];
+
+  options.desktop = {
+    windowManager = lib.pantheon.mkStrOption;
+  };
+}

modules/nixos/desktop/windowManager.nix

@@ -0,0 +1,15 @@
+{ config, lib, ... }:
+{
+  config = lib.mkMerge [
+    (lib.mkIf (config.desktop.windowManager == "hyprland") {
+      environment.variables = {
+	ELECTRON_OZONE_PLATFORM_HINT = "auto";
+	NIXOS_OZONE_WL = "1";
+      };
+      programs.hyprland = {
+        enable = true;
+	withUWSM = true;
+      };
+    })
+  ];
+}