refactor: move timeline config to metadata table (#28227)

* migrate timeline config

---------

Co-authored-by: shenlong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>

mobile/lib/domain/models/config/timeline_config.dart

@@ -0,0 +1,30 @@
+import 'package:immich_mobile/domain/models/timeline.model.dart';
+
+class TimelineConfig {
+  final int tilesPerRow;
+  final GroupAssetsBy groupAssetsBy;
+  final bool storageIndicator;
+
+  const TimelineConfig({this.tilesPerRow = 4, this.groupAssetsBy = GroupAssetsBy.day, this.storageIndicator = true});
+
+  TimelineConfig copyWith({int? tilesPerRow, GroupAssetsBy? groupAssetsBy, bool? storageIndicator}) => TimelineConfig(
+    tilesPerRow: tilesPerRow ?? this.tilesPerRow,
+    groupAssetsBy: groupAssetsBy ?? this.groupAssetsBy,
+    storageIndicator: storageIndicator ?? this.storageIndicator,
+  );
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      (other is TimelineConfig &&
+          other.tilesPerRow == tilesPerRow &&
+          other.groupAssetsBy == groupAssetsBy &&
+          other.storageIndicator == storageIndicator);
+
+  @override
+  int get hashCode => Object.hash(tilesPerRow, groupAssetsBy, storageIndicator);
+
+  @override
+  String toString() =>
+      'TimelineConfig(tilesPerRow: $tilesPerRow, groupAssetsBy: $groupAssetsBy, storageIndicator: $storageIndicator)';
+}