Updated folder structure

lib/data/dto/round.dart

@@ -0,0 +1,46 @@
+/// This class represents a single round in the game.
+/// It is stored within the [GameSession] class.
+/// [roundNum] is the number of the round its reppresenting.
+/// [scores] is a list of the actual scores the players got.
+/// [scoreUpdates] is a list of how the players scores updated this round.
+/// [kamikazePlayerIndex] is the index of the player who got kamikaze. If no one got
+/// kamikaze, this value is null.
+class Round {
+  final int roundNum;
+  final int caboPlayerIndex;
+  final int? kamikazePlayerIndex;
+  final List<int> scores;
+  final List<int> scoreUpdates;
+
+  Round({
+    required this.roundNum,
+    required this.caboPlayerIndex,
+    this.kamikazePlayerIndex,
+    required this.scores,
+    required this.scoreUpdates,
+  });
+
+  @override
+  toString() {
+    return 'Round $roundNum, caboPlayerIndex: $caboPlayerIndex, '
+        'kamikazePlayerIndex: $kamikazePlayerIndex, scores: $scores, '
+        'scoreUpdates: $scoreUpdates, ';
+  }
+
+  /// Converts the Round object to a JSON map.
+  Map<String, dynamic> toJson() => {
+        'roundNum': roundNum,
+        'caboPlayerIndex': caboPlayerIndex,
+        'kamikazePlayerIndex': kamikazePlayerIndex,
+        'scores': scores,
+        'scoreUpdates': scoreUpdates,
+      };
+
+  /// Creates a Round object from a JSON map.
+  Round.fromJson(Map<String, dynamic> json)
+      : roundNum = json['roundNum'],
+        caboPlayerIndex = json['caboPlayerIndex'],
+        kamikazePlayerIndex = json['kamikazePlayerIndex'],
+        scores = List<int>.from(json['scores']),
+        scoreUpdates = List<int>.from(json['scoreUpdates']);
+}