✨(backend) adapt to Find new search pagination

Use nb_results instead of page/page_size argument for /search API.

Signed-off-by: Fabre Florian <ffabre@hybird.org>

src/backend/core/api/viewsets.py

@@ -1119,8 +1119,6 @@ class DocumentViewSet(
             text=text,
             token=access_token,
             visited=get_visited_document_ids_of(queryset, user),
-            page=1,
-            page_size=100,
         )
 
         docs_by_uuid = {str(d.pk): d for d in queryset.filter(pk__in=results)}