Add PDF ticket generation and download feature

Introduces PDF ticket generation using html2canvas and jsPDF, including a new PdfTicketComponent for ticket rendering and a PdfService for PDF creation. Updates purchase success flow to allow users to download tickets as PDFs, adds progress feedback, and includes a test route and component for development. Also refactors order form with a fake fill helper and improves UI details.

src/app/test/test.component.ts

@@ -0,0 +1,11 @@
+import { Component } from '@angular/core';
+
+@Component({
+  selector: 'app-test',
+  standalone: false,
+  templateUrl: './test.component.html',
+  styleUrl: './test.component.css',
+})
+export class TestComponent {
+
+}