fix: Address Rule AVP1040 Type mismatch: CLR property type differs from the value type of {type}

```bash
Avalonia.Media.IPen? Avalonia.Base (net6.0) .\src\Avalonia.Base\Media\GeometryDrawing.cs 55 Active
```

src/Avalonia.Base/Media/GeometryDrawing.cs

@@ -27,8 +27,8 @@ namespace Avalonia.Media
         /// <summary>
         /// Defines the <see cref="Pen"/> property.
         /// </summary>
-        public static readonly StyledProperty<Pen?> PenProperty =
+        public static readonly StyledProperty<IPen?> PenProperty =
-            AvaloniaProperty.Register<GeometryDrawing, Pen?>(nameof(Pen));
+            AvaloniaProperty.Register<GeometryDrawing, IPen?>(nameof(Pen));
 
         /// <summary>
         /// Gets or sets the <see cref="Avalonia.Media.Geometry"/> that describes the shape of this <see cref="GeometryDrawing"/>.

src/Avalonia.Base/Media/PolyLineSegment.cs

@@ -1,5 +1,4 @@
 using System.Collections.Generic;
-using Avalonia.Collections;
 
 namespace Avalonia.Media
 {
@@ -20,7 +19,7 @@ namespace Avalonia.Media
         /// <value>
         /// The points.
         /// </value>
-        public AvaloniaList<Point> Points
+        public Points Points
         {
             get => GetValue(PointsProperty);
             set => SetValue(PointsProperty, value);