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/AnthropicMessage.cs

@@ -0,0 +1,13 @@
+using System.Text.Json;
+
+namespace AIStudio.Provider.Anthropic;
+
+/// <summary>
+/// One turn of the model, handed back unchanged so the conversation can continue.
+/// </summary>
+/// <remarks>
+/// The content blocks are kept as raw JSON on purpose. A turn can carry text, tool uses, and
+/// thinking blocks, and the thinking blocks have to return exactly as they arrived — reading and
+/// rebuilding them would risk changing them.
+/// </remarks>
+public sealed record AnthropicMessage(IList<JsonElement> Content, string Role = "assistant") : IMessage<IList<JsonElement>>;