feat(docking): add floating window support

src/Editor/Ghost.Editor/View/Controls/Docking/DockingLayout.cs

@@ -261,6 +261,7 @@ public class DockingLayout : Control
 
     internal void CreateFloatingWindow(DockDocument doc)
     {
-        // To be implemented in Task 6
+        var window = new FloatingWindow(doc);
+        window.Activate();
     }
 }

src/Editor/Ghost.Editor/View/Controls/Docking/FloatingWindow.cs

@@ -0,0 +1,22 @@
+using Microsoft.UI.Xaml;
+
+namespace Ghost.Editor.View.Controls.Docking;
+
+public class FloatingWindow : Window
+{
+    public FloatingWindow(DockDocument document)
+    {
+        var layout = new DockingLayout();
+        var group = new DockGroup();
+        group.AddChild(document);
+        
+        var panel = new DockPanel();
+        panel.AddChild(group);
+        layout.RootPanel = panel;
+
+        Content = layout;
+        
+        // Basic window setup
+        AppWindow.Resize(new Windows.Graphics.SizeInt32(800, 600));
+    }
+}