Add tests for roadmap pages and homepage

tests/roadmap.spec.ts

@@ -0,0 +1,13 @@
+import path from 'node:path';
+import fs from 'node:fs';
+import { test, expect } from '@playwright/test';
+
+const roadmapIds = fs.readdirSync(path.join(process.cwd(), 'src/roadmaps'));
+
+for (const roadmapId of roadmapIds) {
+  test(`roadmap ${roadmapId}`, async ({ page }) => {
+    await page.goto(`/${roadmapId}`);
+
+    await expect(page).toHaveScreenshot({ fullPage: true });
+  });
+}