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/ToolCallingMessages.cs

@@ -0,0 +1,36 @@
+using AIStudio.Provider;
+using AIStudio.Tools.PluginSystem;
+
+namespace AIStudio.Tools.ToolCallingSystem.Harness;
+
+/// <summary>
+/// The messages the tool calling harness shows the user.
+/// </summary>
+/// <remarks>
+/// Shared between the loop and its adapters: an unusable response looks the same to the user
+/// whether the loop or the adapter noticed it, and one wording means one translation.
+/// </remarks>
+public static class ToolCallingMessages
+{
+    private static string TB(string fallbackEN) => I18N.I.T(fallbackEN, typeof(ToolCallingMessages).Namespace, nameof(ToolCallingMessages));
+
+    /// <summary>
+    /// Builds the exception for a response that cannot be used to continue.
+    /// </summary>
+    /// <param name="providerInstanceName">The provider instance the user configured.</param>
+    public static ProviderRequestException InvalidToolCallingResponse(string providerInstanceName) => new(
+        ProviderRequestFailureReason.NONE,
+        string.Format(TB("The provider '{0}' returned an invalid tool calling response. Check the provider's tool calling configuration and see the logs for details."), providerInstanceName));
+
+    /// <summary>
+    /// Tells the user that a tool round could not be requested at all.
+    /// </summary>
+    /// <remarks>
+    /// Shared by every adapter: the status code is what the user can act on, and the wording
+    /// should not differ by provider API.
+    /// </remarks>
+    /// <param name="statusCode">The status code the provider answered with.</param>
+    public static async Task SendToolCallingRequestFailedAsync(int statusCode) => await MessageBus.INSTANCE.SendError(new(
+        Icons.Material.Filled.Build,
+        string.Format(TB("The tool calling request failed with status code {0}. See the logs for details."), statusCode)));
+}