added action bar for selected bookmark item

lib/widgets/collection_page_widgets/list_item_actions_widget.dart

@@ -0,0 +1,53 @@
+import 'package:flutter/material.dart';
+
+class ListItemActionsWidget extends StatelessWidget {
+  final VoidCallback _onDeletePressed;
+  final VoidCallback _onCancelPressed;
+  final VoidCallback _onEditPressed;
+
+  const ListItemActionsWidget({
+    super.key,
+    required void Function() onDeletePressed,
+    required void Function() onCancelPressed,
+    required void Function() onEditPressed,
+  }) : _onEditPressed = onEditPressed,
+       _onCancelPressed = onCancelPressed,
+       _onDeletePressed = onDeletePressed;
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      padding: EdgeInsetsGeometry.fromLTRB(
+        10,
+        10,
+        10,
+        MediaQuery.of(context).viewPadding.bottom,
+      ),
+      color: Theme.of(context).colorScheme.surfaceContainer,
+      child: Row(
+        mainAxisAlignment: MainAxisAlignment.spaceBetween,
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          IconButton(
+            onPressed: _onCancelPressed,
+            icon: const Icon(Icons.close_rounded),
+          ),
+          Row(
+            mainAxisAlignment: MainAxisAlignment.end,
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              IconButton(
+                onPressed: _onDeletePressed,
+                icon: const Icon(Icons.delete_forever_rounded),
+              ),
+              IconButton(
+                onPressed: _onEditPressed,
+                icon: const Icon(Icons.edit_rounded),
+              ),
+            ],
+          ),
+        ],
+      ),
+    );
+  }
+}