Container size scan, improvements

src/AppCommon/FileTime.App.ContainerSizeScanner/ChildContainerPreview.cs

@@ -0,0 +1,15 @@
+using DeclarativeProperty;
+
+namespace FileTime.App.ContainerSizeScanner;
+
+public class ChildContainerPreview : ISizePreviewItem
+{
+    public ChildContainerPreview(ISizeScanContainer container)
+    {
+        Name = container.Name;
+        Size = container.Size;
+    }
+
+    public string Name { get; }
+    public IDeclarativeProperty<long> Size { get; }
+}