add plasma-manager, add shortcuts and hotkeys

modules/home/desktop/shortcuts/default.nix

@@ -0,0 +1,26 @@
+{
+  config,
+  lib,
+  namespace,
+  ...
+}:
+with lib;
+with lib.${namespace};
+let
+  cfg = config.${namespace}.desktop.hotkeys;
+in
+{
+  options.${namespace}.desktop.hotkeys = with types; {
+    enable = mkBoolOpt false "Whether or not to enable kitty.";
+  };
+
+  config = mkIf cfg.enable {
+    programs.plasma = {
+      enable = true;
+      shortcuts.kwin = {
+        "Window Close" = [ "Meta+Shift+Q" "Alt+F4" ];
+      };
+    };
+  };
+
+}