⬆️(frontend) bump cunningham to 3.0.0

Last bump to react 19 was a breaking change with
the previous version of Cunnigham, so we need to
update cunningham to 3.0.0 to be compatible with it.
We can now remove Cunnigham from the list of ignored
dependencies in the renovate.json file.

renovate.json

@@ -14,7 +14,6 @@
       "groupName": "ignored js dependencies",
       "matchManagers": ["npm"],
       "matchPackageNames": [
-        "@openfun/cunningham-react",
         "eslint",
         "fetch-mock",
         "node",

src/frontend/apps/impress/package.json

@@ -23,7 +23,7 @@
     "@blocknote/xl-pdf-exporter": "*",
     "@gouvfr-lasuite/integration": "1.0.2",
     "@hocuspocus/provider": "2.15.2",
-    "@openfun/cunningham-react": "2.9.4",
+    "@openfun/cunningham-react": "3.0.0",
     "@react-pdf/renderer": "4.1.6",
     "@sentry/nextjs": "9.3.0",
     "@tanstack/react-query": "5.67.1",