Add frontend.

frontend/src/app/components/header/header.component.ts

@@ -0,0 +1,13 @@
+import { Component } from '@angular/core';
+import { MatIconModule } from '@angular/material/icon';
+import { MatButtonModule } from '@angular/material/button';
+import { RouterModule } from '@angular/router';
+
+@Component({
+  selector: 'app-header',
+  standalone: true,
+  imports: [MatButtonModule, MatIconModule, RouterModule],
+  templateUrl: './header.component.html',
+  styleUrl: './header.component.scss',
+})
+export class HeaderComponent {}