Improved the OpenAI provider (#548)

app/MindWork AI Studio/Provider/OpenAI/ResponsesAPIRequest.cs

@@ -0,0 +1,21 @@
+namespace AIStudio.Provider.OpenAI;
+
+/// <summary>
+/// The request body for the Responses API.
+/// </summary>
+/// <param name="Model">Which model to use.</param>
+/// <param name="Input">The chat messages.</param>
+/// <param name="Stream">Whether to stream the response.</param>
+/// <param name="Store">Whether to store the response on the server (usually OpenAI's infrastructure).</param>
+/// <param name="Tools">The tools to use for the request.</param>
+public record ResponsesAPIRequest(
+    string Model,
+    IList<Message> Input,
+    bool Stream,
+    bool Store,
+    IList<Tool> Tools)
+{
+    public ResponsesAPIRequest() : this(string.Empty, [], true, false, [])
+    {
+    }
+}