finish mobile menu and scroll event

src/app/header/header.ts

@@ -20,6 +20,10 @@ export class Header {
     this.isMenuOpen = false;
   }
 
+  scrollTo(id: string): void {
+    document.getElementById(id)?.scrollIntoView({ behavior: 'smooth' });
+  }
+
   @HostListener('document:click', ['$event'])
   onDocumentClick(event: MouseEvent): void {
     if (!this.isMenuOpen) {