Add view for deleting item

Views/WarningDeleteItem.axaml.cs

@@ -0,0 +1,15 @@
+using System;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace ReceiptPDFBuilder.Views
+{
+    public partial class WarningDeleteItem : UserControl
+    {
+        public WarningDeleteItem()
+        {
+            this.InitializeComponent();
+        }
+    }
+}