Add scripts for playwright tests

package.json

@@ -13,7 +13,10 @@
     "messages:extract:clean": "lingui extract --locale en --clean",
     "messages:compile": "lingui compile",
     "fetch-i18n-volunteers": "env $(cat .env.local | grep -v \"#\" | xargs) node scripts/fetch-i18n-volunteers.js",
-    "readme:i18n-volunteers": "node scripts/update-i18n-volunteers-readme.js"
+    "readme:i18n-volunteers": "node scripts/update-i18n-volunteers-readme.js",
+    "test": "playwright test",
+    "test:ui": "playwright test --ui",
+    "test:headed": "playwright test --headed"
   },
   "dependencies": {
     "@formatjs/intl-localematcher": "~0.6.1",