Update flutter_lints to 6.0.0 and fix widget tests

- Upgrade flutter_lints from 5.0.0 to 6.0.0
- Fix widget test to reference correct app class (ArcheryBookkeeperApp)
- Update widget test to check for actual app title "Archery Scoring"
- Clean up project description in pubspec.yaml

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

test/widget_test.dart

@@ -5,26 +5,16 @@
 // gestures. You can also use WidgetTester to find child widgets in the widget
 // tree, read text, and verify that the values of widget properties are correct.
 
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 import 'package:archery_bookkeeper/main.dart';
 
 void main() {
-  testWidgets('Counter increments smoke test', (WidgetTester tester) async {
+  testWidgets('Archery Bookkeeper app loads', (WidgetTester tester) async {
     // Build our app and trigger a frame.
-    await tester.pumpWidget(const MyApp());
+    await tester.pumpWidget(const ArcheryBookkeeperApp());
 
-    // Verify that our counter starts at 0.
-    expect(find.text('0'), findsOneWidget);
-    expect(find.text('1'), findsNothing);
-
-    // Tap the '+' icon and trigger a frame.
-    await tester.tap(find.byIcon(Icons.add));
-    await tester.pump();
-
-    // Verify that our counter has incremented.
-    expect(find.text('0'), findsNothing);
-    expect(find.text('1'), findsOneWidget);
+    // Verify that the app loads properly
+    expect(find.text('Archery Scoring'), findsOneWidget);
   });
 }