Added tool calling support (#731)

Co-authored-by: krut_ni <nils.kruthoff@dlr.de>
Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

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

@@ -0,0 +1,16 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace AIStudio.Provider.OpenAI;
+
+public sealed record ChatCompletionToolCall
+{
+    public string? Id { get; init; }
+
+    public string? Type { get; init; } = "function";
+
+    public ChatCompletionToolFunction? Function { get; init; }
+
+    [JsonExtensionData]
+    public IDictionary<string, JsonElement> AdditionalMetadata { get; init; } = new Dictionary<string, JsonElement>();
+}