fox_utils 0.1.7: clipboard, drag & drop, Android file saving

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test/fox_utils_test.dart

@@ -0,0 +1,12 @@
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:fox_utils/fox_utils.dart';
+
+void main() {
+  test('adds one to input values', () {
+    final calculator = Calculator();
+    expect(calculator.addOne(2), 3);
+    expect(calculator.addOne(-7), -6);
+    expect(calculator.addOne(0), 1);
+  });
+}