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/Tools/ToolCallingSystem/Harness/IToolCallingLoop.cs

@@ -0,0 +1,23 @@
+using AIStudio.Provider;
+
+namespace AIStudio.Tools.ToolCallingSystem.Harness;
+
+/// <summary>
+/// Drives a conversation in which a model may call tools before it answers.
+/// </summary>
+/// <remarks>
+/// Resolved through dependency injection so that a different harness can take over later without
+/// touching the providers: an agent mode needs more than "ask, execute, ask again", but it speaks
+/// to providers through the same adapters.
+/// </remarks>
+public interface IToolCallingLoop
+{
+    /// <summary>
+    /// Runs the conversation until the model answers, the limits are reached, or the request fails.
+    /// </summary>
+    /// <param name="adapter">The adapter for the provider API in use.</param>
+    /// <param name="context">The chat, tools, and UI state this run belongs to.</param>
+    /// <param name="token">The cancellation token.</param>
+    /// <returns>The model's final answer, with the sources the tools contributed.</returns>
+    public IAsyncEnumerable<ContentStreamChunk> RunAsync(IToolCallingProviderAdapter adapter, ToolCallingLoopContext context, CancellationToken token = default);
+}