feat: add navbar component to the application

frontend/src/app/shared/components/navbar/navbar.component.ts

@@ -0,0 +1,18 @@
+import { Component } from '@angular/core';
+import { RouterModule } from '@angular/router';
+import { CommonModule } from '@angular/common';
+
+@Component({
+  selector: 'app-navbar',
+  templateUrl: './navbar.component.html',
+  styleUrls: ['./navbar.component.scss'],
+  standalone: true,
+  imports: [CommonModule, RouterModule]
+})
+export class NavbarComponent {
+  isMenuOpen = false;
+
+  toggleMenu() {
+    this.isMenuOpen = !this.isMenuOpen;
+  }
+}