Add keyboard shortcuts for usage with BT Pedal

lib/bt_pedal_shortcuts.dart

@@ -0,0 +1,42 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+class BtPedalShortcuts extends StatefulWidget {
+  final Widget child;
+  final VoidCallback? onTurnPageForward;
+  final VoidCallback? onTurnPageBackward;
+
+  const BtPedalShortcuts({
+    super.key,
+    required this.child,
+    this.onTurnPageForward,
+    this.onTurnPageBackward,
+  });
+
+  @override
+  State<BtPedalShortcuts> createState() => _BtPedalShortcutsState();
+}
+
+class _BtPedalShortcutsState extends State<BtPedalShortcuts> {
+  String lastAction = "Press pedal...";
+
+  @override
+  Widget build(BuildContext context) {
+    return CallbackShortcuts(
+      bindings: <ShortcutActivator, VoidCallback>{
+        // Shortcuts for page forward
+        const SingleActivator(LogicalKeyboardKey.arrowUp):
+            widget.onTurnPageForward ?? () => {},
+        const SingleActivator(LogicalKeyboardKey.arrowRight):
+            widget.onTurnPageForward ?? () => {},
+
+        // Shortcuts for page backward
+        const SingleActivator(LogicalKeyboardKey.arrowDown):
+            widget.onTurnPageBackward ?? () => {},
+        const SingleActivator(LogicalKeyboardKey.arrowLeft):
+            widget.onTurnPageBackward ?? () => {},
+      },
+      child: Focus(autofocus: true, child: widget.child),
+    );
+  }
+}