Adding match endpoints, services and providers, additionally added a page in the frontend that displays the data

frontend_splatournament_manager/lib/models/match.dart

@@ -0,0 +1,46 @@
+class Match {
+  final int id;
+  final int tournamentId;
+  final int round;
+  final int matchNumber;
+  final int? team1Id;
+  final int? team2Id;
+  final int? winnerId;
+
+  Match({
+    required this.id,
+    required this.tournamentId,
+    required this.round,
+    required this.matchNumber,
+    this.team1Id,
+    this.team2Id,
+    this.winnerId,
+  });
+
+  factory Match.fromJson(Map<String, dynamic> json) {
+    return Match(
+      id: json['id'],
+      tournamentId: json['tournamentId'],
+      round: json['round'],
+      matchNumber: json['matchNumber'],
+      team1Id: json['team1Id'],
+      team2Id: json['team2Id'],
+      winnerId: json['winnerId'],
+    );
+  }
+
+  Map<String, dynamic> toJson() {
+    return {
+      'id': id,
+      'tournamentId': tournamentId,
+      'round': round,
+      'matchNumber': matchNumber,
+      'team1Id': team1Id,
+      'team2Id': team2Id,
+      'winnerId': winnerId,
+    };
+  }
+
+  bool get hasWinner => winnerId != null;
+  bool get canBePlayed => team1Id != null && team2Id != null;
+}