add zen-browser as standard application module

modules/features/applications/gui/zen-browser.nix

@@ -0,0 +1,17 @@
+{ inputs, self, ... }: let
+  optionName = "features.applications.gui.zen-browser.enable";
+in {
+  imports = [ (inputs.helpers.mkStandardFeature.flakeModule "graphics" optionName "Zen Browser") ];
+
+  flake.nixosModules.graphics = { config, pkgs, ... }: {
+    imports = [ (inputs.helpers.mkStandardFeature.nixosModule { inherit config optionName; } {
+      environment.systemPackages = [ inputs.zen-browser.packages.${pkgs.stdenv.hostPlatform.system}.default ];
+    }) ];
+  };
+
+  flake.homeModules.graphics = { config, pkgs, ... }: {
+    imports = [ (inputs.helpers.mkStandardFeature.homeModule { inherit config optionName; } {
+      home.packages = [ inputs.zen-browser.packages.${pkgs.stdenv.hostPlatform.system}.default ];
+    }) ];
+  };
+}