[ADF-3591] spellcheck support for code (#3827)

* setup spellcheck

demo-shell/e2e/app.po.ts

@@ -17,7 +17,7 @@
 
 import { browser, element, by } from 'protractor';
 
-export class MyappPage {
+export class MyAppPage {
     navigateTo() {
         return browser.get('/');
     }