first integration tests (#64)

resolves #60

Co-authored-by: johba <johba@harb.eth>
Reviewed-on: https://codeberg.org/johba/harb/pulls/64

playwright.config.ts

@@ -0,0 +1,17 @@
+import { defineConfig } from '@playwright/test';
+
+export default defineConfig({
+  testDir: './tests/e2e',
+  testMatch: '**/*.spec.ts',
+  fullyParallel: false,
+  timeout: 5 * 60 * 1000,
+  expect: {
+    timeout: 30_000,
+  },
+  retries: process.env.CI ? 1 : 0,
+  use: {
+    headless: true,
+    viewport: { width: 1280, height: 720 },
+    actionTimeout: 0,
+  },
+});