Add niri module, flake update

modules/hm/niri.nix

@@ -0,0 +1,28 @@
+{
+  pkgs,
+  osConfig,
+  lib,
+  ...
+}:
+let
+  enable = osConfig.programs.niri.enable;
+in
+{
+
+  programs = lib.mkIf (enable) {
+    alacritty.enable = true; # Super+T in the default setting (terminal)
+    fuzzel.enable = true; # Super+D in the default setting (app launcher)
+    swaylock.enable = true; # Super+Alt+L in the default setting (screen locker)
+    waybar.enable = true; # launch on startup in the default setting (bar)
+  };
+  services = lib.mkIf (enable) {
+    mako.enable = true; # notification daemon
+    swayidle.enable = true; # idle management daemon
+  };
+
+  home.packages =
+    with pkgs;
+    lib.mkIf (enable) [
+      swaybg
+    ];
+}

modules/hm/vivaldi.nix

@@ -25,7 +25,7 @@ in
       executable = true;
     };
 
-    programs.vivaldi = {
+    programs.vivaldi = lib.mkIf (conf.enable) {
       nativeMessagingHosts =
         [ ]
         ++ lib.optionals (osConfig.services.desktopManager.plasma6.enable) [