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

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

lib/fox_utils.dart

@@ -0,0 +1,9 @@
+export 'android_files.dart';
+export 'clipboard_x.dart';
+export 'desktop_drop_x.dart';
+
+/// A Calculator.
+class Calculator {
+  /// Returns [value] plus 1.
+  int addOne(int value) => value + 1;
+}