Update icon assets

Ghost.Editor.Core/SceneGraph/SceneNode.cs

@@ -1,14 +1,45 @@
-using Ghost.Editor.Core.Inspector;
 using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Controls;
 
 namespace Ghost.Editor.Core.SceneGraph;
 
-public sealed partial class SceneNode : SceneGraphNode, IInspectable
+public sealed partial class SceneNode : SceneGraphNode
 {
-    public IconSource? Icon => throw new NotImplementedException();
+    public override IconSource? CreateIcon()
+    {
+        return new FontIconSource
+        {
+            Glyph = "\uF156"
+        };
+    }
 
-    public UIElement? HeaderContent => throw new NotImplementedException();
+    // TODO: Implement custom header and inspector UI for the SceneNode
+    public override UIElement? CreateHeader()
+    {
+        return null;
+    }
 
-    public UIElement? InspectorContent => throw new NotImplementedException();
-}
+    public override UIElement? CreateInspector()
+    {
+        return null;
+    }
+
+    public override DataTemplate GetSceneHierarchyTemplate()
+    {
+        var template = @"
+        <DataTemplate xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation"" xmlns:sg=""using:Ghost.Editor.Core.SceneGraph"" x:DataType=""sg:SceneGraphNode"">
+            <TreeViewItem
+                AutomationProperties.Name=""{x:Bind Name, Mode=OneWay}""
+                Background=""{ThemeResource ControlSolidFillColorDefaultBrush}""
+                IsExpanded=""True""
+                ItemsSource=""{ x:Bind Children, Mode=OneWay}"" >
+                <StackPanel Orientation=""Horizontal"" >
+                    <FontIcon FontSize=""14"" Glyph=""&#xF156;""/>
+                    <TextBlock Margin=""10,0"" Text=""{ x:Bind Name, Mode=OneWay}""/>
+                </StackPanel>
+            </TreeViewItem>
+        </DataTemplate>";
+
+        return (DataTemplate)Microsoft.UI.Xaml.Markup.XamlReader.Load(template);
+    }
+}