Initial commit with gitignore

lib/models/player.dart

@@ -0,0 +1,16 @@
+class Player {
+  final String name;
+  final Set<String> positions;
+
+  Player({required this.name, required this.positions});
+
+  Map<String, dynamic> toMap() => {
+        'name': name,
+        'positions': positions.toList(),
+      };
+
+  factory Player.fromMap(Map<String, dynamic> map) => Player(
+        name: (map['name'] ?? '').toString(),
+        positions: Set<String>.from(map['positions'] ?? const []),
+      );
+}