Add missing javascript dependencies to package.json. Move javascripts files to app/javascript. Add first javascript test. Change test mode

app/javascript/application.js

@@ -1 +1,15 @@
 // Entry point for the build script in your package.json
+
+  import Rails from "@rails/ujs";
+  import Turbolinks from "turbolinks";
+  import * as ActiveStorage from "@rails/activestorage";
+  // import "channels";
+
+  Rails.start();
+  Turbolinks.start();
+  ActiveStorage.start();
+import { initializeListenersForNavDropdowns } from "./dashboard.js";
+import { initializeListenersForHomeDropdowns } from "./home.js";
+
+initializeListenersForNavDropdowns();
+initializeListenersForHomeDropdowns();