Added Tournament List and detail Page

frontend_splatournament_manager/lib/pages/tournament_detail_page.dart

@@ -0,0 +1,14 @@
+import 'package:flutter/material.dart';
+
+class TournamentDetailPage extends StatelessWidget {
+  const TournamentDetailPage({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: Text("Tournament"),),
+      body: Center(child: Text("Detail"),)
+    );
+  }
+
+}