Rearrange files to shared project

src/MayShow.Shared/Views/WarningDeleteItem.axaml.cs

@@ -0,0 +1,14 @@
+using System;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace MayShow.Views;
+
+public partial class WarningDeleteItem : UserControl
+{
+    public WarningDeleteItem()
+    {
+        this.InitializeComponent();
+    }
+}