✨(frontend) add crisp chatbot

Integrate Crisp chatbot for immediate user support access.

This enables real-time interaction, enhancing user experience
by providing quick assistance.

src/frontend/apps/impress/package.json

@@ -23,6 +23,7 @@
     "@openfun/cunningham-react": "2.9.4",
     "@sentry/nextjs": "8.40.0",
     "@tanstack/react-query": "5.61.3",
+    "crisp-sdk-web": "1.0.25",
     "i18next": "24.0.0",
     "i18next-browser-languagedetector": "8.0.0",
     "idb": "8.0.0",