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/models/search/search_filter.model.dart

@@ -3,6 +3,7 @@ import 'dart:convert';
 
 import 'package:immich_mobile/domain/models/person.model.dart';
 import 'package:immich_mobile/entities/asset.entity.dart';
+import 'package:openapi/api.dart' show AssetOrder;
 
 class SearchLocationFilter {
   String? country;
@@ -221,6 +222,7 @@ class SearchFilter {
   SearchDateFilter date;
   SearchRatingFilter rating;
   SearchDisplayFilters display;
+  AssetOrder? order;
 
   // Enum
   AssetType mediaType;
@@ -233,6 +235,7 @@ class SearchFilter {
     this.language,
     this.assetId,
     this.tagIds,
+    this.order,
     required this.people,
     required this.location,
     required this.camera,
@@ -279,6 +282,7 @@ class SearchFilter {
     SearchDisplayFilters? display,
     SearchRatingFilter? rating,
     AssetType? mediaType,
+    AssetOrder? Function()? order,
   }) {
     return SearchFilter(
       context: context ?? this.context,
@@ -295,12 +299,13 @@ class SearchFilter {
       rating: rating ?? this.rating,
       mediaType: mediaType ?? this.mediaType,
       tagIds: tagIds ?? this.tagIds,
+      order: order != null ? order() : this.order,
     );
   }
 
   @override
   String toString() {
-    return 'SearchFilter(context: $context, filename: $filename, description: $description, language: $language, ocr: $ocr, people: $people, location: $location, tagIds: $tagIds, camera: $camera, date: $date, display: $display, rating: $rating, mediaType: $mediaType, assetId: $assetId)';
+    return 'SearchFilter(context: $context, filename: $filename, description: $description, language: $language, ocr: $ocr, people: $people, location: $location, tagIds: $tagIds, camera: $camera, date: $date, display: $display, rating: $rating, mediaType: $mediaType, assetId: $assetId, order: $order)';
   }
 
   @override
@@ -320,7 +325,8 @@ class SearchFilter {
         other.date == date &&
         other.display == display &&
         other.rating == rating &&
-        other.mediaType == mediaType;
+        other.mediaType == mediaType &&
+        other.order == order;
   }
 
   @override
@@ -338,6 +344,7 @@ class SearchFilter {
         date.hashCode ^
         display.hashCode ^
         rating.hashCode ^
-        mediaType.hashCode;
+        mediaType.hashCode ^
+        order.hashCode;
   }
 }