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.

i18n/en.json

@@ -689,6 +689,7 @@
   "backup_settings_subtitle": "Manage upload settings",
   "backup_upload_details_page_more_details": "Tap for more details",
   "backward": "Backward",
+  "best_match": "Best match",
   "biometric_auth_enabled": "Biometric authentication enabled",
   "biometric_locked_out": "You are locked out of biometric authentication",
   "biometric_no_options": "No biometric options available",
@@ -1945,6 +1946,8 @@
   "search_filter_media_type_title": "Select media type",
   "search_filter_ocr": "Search by OCR",
   "search_filter_people_title": "Select people",
+  "search_filter_sort_order": "Sort Order",
+  "search_filter_sort_order_title": "Select sort order",
   "search_filter_star_rating": "Star Rating",
   "search_filter_tags_title": "Select tags",
   "search_for": "Search for",
@@ -2160,6 +2163,7 @@
   "sort_modified": "Date modified",
   "sort_newest": "Newest photo",
   "sort_oldest": "Oldest photo",
+  "sort_order": "Sort order",
   "sort_people_by_similarity": "Sort people by similarity",
   "sort_recent": "Most recent photo",
   "sort_title": "Title",