Add PageUp and PageDown key support to menu controller

Author: lazaronixon

lib/generators/css_zero/add/templates/app/javascript/controllers/menu_controller.js

@@ -28,10 +28,12 @@ export default class extends Controller {
         this.#cancel(event)
         this.#next()
         break
+      case "PageUp":
       case "Home":
         this.#cancel(event)
         this.#first()
         break
+      case "PageDown":
       case "End":
         this.#cancel(event)
         this.#last()