✨(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/impress/settings.py

@@ -120,6 +120,9 @@ class Base(Configuration):
     SEARCH_INDEXER_QUERY_URL = values.Value(
         default=None, environ_name="SEARCH_INDEXER_QUERY_URL", environ_prefix=None
     )
+    SEARCH_INDEXER_QUERY_LIMIT = values.PositiveIntegerValue(
+        default=50, environ_name="SEARCH_INDEXER_QUERY_LIMIT", environ_prefix=None
+    )
 
     # Static files (CSS, JavaScript, Images)
     STATIC_URL = "/static/"