feat: Added Image.Bytes auto-property to get Base64 json as byte array.

src/libs/OpenAI/Image.Bytes.cs

@@ -0,0 +1,12 @@
+namespace OpenAI;
+
+public partial class Image
+{
+    /// <summary>
+    /// Returns bytes of base64-encoded JSON of the generated image.
+    /// </summary>
+    /// <exception cref="InvalidOperationException"></exception>
+    public byte[] Bytes => B64Json == null || string.IsNullOrWhiteSpace(B64Json)
+        ? throw new InvalidOperationException("The image is not available in base64 format.")
+        : Convert.FromBase64String(B64Json);
+}

src/libs/OpenAI/OpenAI.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <TargetFrameworks>netstandard2.0;net4.6.2;net6.0;net8.0</TargetFrameworks>
-    <NoWarn>$(NoWarn);CA1724;CA2227</NoWarn>
+    <NoWarn>$(NoWarn);CA1724;CA2227;CA1819</NoWarn>
   </PropertyGroup>
 
   <ItemGroup>