Bump version, migrate to FluentAvalonia with bug fixes

Needlework.Net.Desktop/Controls/BusyArea.axaml.cs

@@ -0,0 +1,30 @@
+using Avalonia;
+using Avalonia.Controls;
+
+namespace Needlework.Net.Desktop.Controls;
+
+public partial class BusyArea : UserControl
+{
+    public BusyArea()
+    {
+        InitializeComponent();
+    }
+
+    public static readonly StyledProperty<bool> IsBusyProperty =
+       AvaloniaProperty.Register<BusyArea, bool>(nameof(IsBusy), defaultValue: false);
+
+    public bool IsBusy
+    {
+        get { return GetValue(IsBusyProperty); }
+        set { SetValue(IsBusyProperty, value); }
+    }
+
+    public static readonly StyledProperty<string?> BusyTextProperty =
+        AvaloniaProperty.Register<BusyArea, string?>(nameof(BusyText), defaultValue: null);
+
+    public string? BusyText
+    {
+        get => GetValue(BusyTextProperty);
+        set => SetValue(BusyTextProperty, value);
+    }
+}