refactor: move model to domain

mobile/lib/domain/models/time_range.model.dart

@@ -0,0 +1,15 @@
+import 'package:immich_mobile/utils/option.dart';
+
+class TimeRange {
+  final Option<DateTime> from;
+  final Option<DateTime> to;
+
+  const TimeRange({this.from = const None(), this.to = const None()});
+
+  TimeRange copyWith({Option<DateTime>? from, Option<DateTime>? to}) {
+    return TimeRange(from: from ?? this.from, to: to ?? this.to);
+  }
+
+  TimeRange clearFrom() => TimeRange(to: to);
+  TimeRange clearTo() => TimeRange(from: from);
+}