feat: sort smart search

Smart search currently returns a list of assets by their score. It would
be nice if we could instead filter assets, and then list them by date.
This is the default behaviour of other platforms.

mobile/lib/infrastructure/repositories/search_api.repository.dart

@@ -37,6 +37,7 @@ class SearchApiRepository extends ApiRepository {
           personIds: filter.people.map((e) => e.id).toList(),
           tagIds: filter.tagIds,
           type: type,
+          order: filter.order,
           page: page,
           size: 100,
         ),
@@ -62,6 +63,7 @@ class SearchApiRepository extends ApiRepository {
         personIds: filter.people.map((e) => e.id).toList(),
         tagIds: filter.tagIds,
         type: type,
+        order: filter.order ?? AssetOrder.desc,
         page: page,
         size: 1000,
       ),