Start ghostwriter module

modules/apps/default.nix

@@ -2,6 +2,7 @@
 
 {
   imports = [
+    ./ghostwriter.nix
     ./konsole.nix
     ./kate
     ./okular.nix

modules/apps/ghostwriter.nix

@@ -0,0 +1,23 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.programs.ghostwriter;
+in
+{
+  options.programs.ghostwriter = {
+    enable = lib.mkEnableOption ''
+      Enable configuration management for Ghostwriter.
+    '';
+
+    package = lib.mkPackageOption pkgs [ "kdePackages" "ghostwriter" ] {
+      example = "pkgs.kdePackages.ghostwriter";
+      extraDescription = ''
+        Use `pkgs.libsForQt5.ghostwriter` in Plasma5 and
+        `pkgs.kdePackages.ghostwriter` in Plasma6.
+      '';
+    };
+  };
+
+  config = (lib.mkIf cfg.enable {
+    home.packages = [ cfg.package ];
+  });
+}