Implement createSession and store it in localStorage

src/app/components/app.component.ts

@@ -0,0 +1,11 @@
+import { Component } from '@angular/core';
+
+@Component({
+  selector: 'app-root',
+  templateUrl: './app.component.html',
+  standalone: false,
+  styleUrl: './app.component.css'
+})
+export class AppComponent {
+  title = 'swisssign-challenge-ui';
+}