✨(frontend) export pdf docx front side

We have added the export to pdf and docx feature
to the front side. Thanks to that, the images are now
correctly exported even when the doc is private.
To be able to export the doc, the data must be
in blocknote format, for legacy purpose, we have
to convert the template to blocknote format before
exporting it.

src/frontend/apps/impress/package.json

@@ -18,13 +18,17 @@
     "@blocknote/core": "0.21.0",
     "@blocknote/mantine": "0.21.0",
     "@blocknote/react": "0.21.0",
+    "@blocknote/xl-docx-exporter": "0.21.0",
+    "@blocknote/xl-pdf-exporter": "0.21.0",
     "@gouvfr-lasuite/integration": "1.0.2",
     "@hocuspocus/provider": "2.15.0",
     "@openfun/cunningham-react": "2.9.4",
+    "@react-pdf/renderer": "4.1.6",
     "@sentry/nextjs": "8.47.0",
     "@tanstack/react-query": "5.62.11",
     "cmdk": "1.0.4",
     "crisp-sdk-web": "1.0.25",
+    "docx": "9.1.0",
     "i18next": "24.2.0",
     "i18next-browser-languagedetector": "8.0.2",
     "idb": "8.0.1",