DataContent does not work with images or audio

[dcostea]

Describe the bug
Microsoft.Extensions.AI.DataContent message type is not supported with OnnxRuntimeGenAIChatClient client.

To Reproduce
Steps to reproduce the behavior:

using var onnxChatClient = new OnnxRuntimeGenAIChatClient(model);
byte[] imageBytes = File.ReadAllBytes(@"path.jpg");
var message = new(ChatRole.User, [
    new TextContent(query),
    new DataContent(imageBytes, "image/jpeg")
])
var response = onnxChatClient.GetResponseAsync([message]))

or

using var onnxChatClient = new OnnxRuntimeGenAIChatClient(model);
var message = new(ChatRole.User, [
    new TextContent(query),
    new UriContent(new Uri(@"https://path/to/image"), "image/jpeg")
]),
var response = onnxChatClient.GetResponseAsync([message]))

non-text content is not processed.
I'm expecting the model to "see" the attached image.

Desktop (please complete the following information):

• OS: [Win/Linux]
• Version [Microsoft.ML.OnnxRuntimeGenAI.Cuda 0.11.1]