Add a bunch of placeholder files

Placeholder files for future app structure
Also figured out how to have root url code stuff

frontend-reactive/app/routes/application.ts

@@ -0,0 +1,7 @@
+import Route from '@ember/routing/route';
+
+export default class ApplicationRoute extends Route {
+  model() {
+    console.log('root route loaded');
+  }
+}