refactor(nixosmodules): move desktop configs to a module

modules/nixos/de.nix

@@ -0,0 +1,59 @@
+{
+  config,
+  lib,
+  ...
+}:
+let
+  moduleName = "de";
+  cfg = config."${moduleName}";
+in
+{
+  options = {
+    "${moduleName}" = {
+      enable = lib.mkEnableOption "Enable ${moduleName}.";
+      type = lib.mkOption {
+        type = lib.types.str;
+        default = "";
+        example = "hyprland";
+        description = "What desktop environment should be installed on the host.";
+      };
+    };
+  };
+
+  config = lib.mkIf cfg.enable (
+    lib.mkMerge [
+      {
+        # Enable audio and other common config
+        security.rtkit.enable = true;
+        services.pipewire = {
+          enable = true;
+          extraConfig = { };
+          jack.enable = true;
+          pulse.enable = true;
+          alsa = {
+            enable = true;
+            support32Bit = true;
+          };
+        };
+        hardware.bluetooth = {
+          enable = true;
+          powerOnBoot = true;
+        };
+      }
+      (lib.mkIf config.hmModules.enable {
+        home-manager.users."${config.nixosModules.mainUser}".services.spotifyd = {
+          enable = true;
+          settings = {
+            global = {
+              device_name = "${config.nixosModules.hostname}";
+              device_type = "computer";
+              zeroconf_port = 5353;
+            };
+          };
+        };
+        networking.firewall.allowedTCPPorts = [ 5353 ];
+        networking.firewall.allowedUDPPorts = [ 5353 ];
+      })
+    ]
+  );
+}

modules/nixos/default.nix

@@ -10,6 +10,7 @@ in
 {
   imports = [
     ./boot.nix
+    ./de.nix
     ./hardware.nix
     ./nix-config.nix
     ./gaming.nix