Add Stream overload for Png AddMetadata

StabilityMatrix.Avalonia/Helpers/PngDataHelper.cs

@@ -16,6 +16,17 @@ public static class PngDataHelper
     private static readonly byte[] Text = { 0x74, 0x45, 0x58, 0x74 };
     private static readonly byte[] Iend = { 0x49, 0x45, 0x4E, 0x44 };
 
+    public static byte[] AddMetadata(
+        Stream inputStream,
+        GenerationParameters generationParameters,
+        InferenceProjectDocument projectDocument
+    )
+    {
+        using var ms = new MemoryStream();
+        inputStream.CopyTo(ms);
+        return AddMetadata(ms.ToArray(), generationParameters, projectDocument);
+    }
+
     public static byte[] AddMetadata(
         byte[] inputImage,
         GenerationParameters generationParameters,