✨ Add initial setup for frontend / end-to-end tests with Playwright (#1261)

Co-authored-by: Sebastián Ramírez <tiangolo@gmail.com>

frontend/tests/example.spec.ts

@@ -0,0 +1,8 @@
+import { test, expect } from '@playwright/test';
+
+test('has title', async ({ page }) => {
+  await page.goto('https://playwright.dev/');
+
+  // Expect a title "to contain" a substring.
+  await expect(page).toHaveTitle(/Playwright/);
+});