Implemented following stuff

- Basic Material Design
- Default Component to see anything
- theme switching between light and dark
- language change between german and english

src/app/app.routes.ts

@@ -1,3 +1,6 @@
 import { Routes } from '@angular/router';
+import {WelcomeComponent} from './features/welcome/welcome';
 
-export const routes: Routes = [];
+export const routes: Routes = [
+  { path: '', component: WelcomeComponent },
+];