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/Anthropic/AnthropicToolUse.cs

@@ -0,0 +1,17 @@
+using System.Text.Json;
+
+namespace AIStudio.Provider.Anthropic;
+
+public sealed record AnthropicToolUse
+{
+    public string Id { get; init; } = string.Empty;
+
+    public string Name { get; init; } = string.Empty;
+
+    public JsonElement Input { get; init; }
+
+    /// <summary>
+    /// The arguments as JSON text, which is what the tool executor works with.
+    /// </summary>
+    public string Arguments => this.Input.ValueKind is JsonValueKind.Undefined ? "{}" : this.Input.GetRawText();
+}