feat: create chat message

src/AnthropicClient/Models/ToolChoice.cs

@@ -0,0 +1,22 @@
+namespace AnthropicClient.Models;
+
+/// <summary>
+/// Represents a tool choice mode.
+/// </summary>
+public abstract class ToolChoice
+{
+  /// <summary>
+  /// Gets the type of the tool choice.
+  /// </summary>
+  public string Type { get; init; } = string.Empty;
+
+  /// <summary>
+  /// Initializes a new instance of the <see cref="ToolChoice"/> class.
+  /// </summary>
+  /// <param name="type">The type of the tool choice.</param>
+  /// <returns>A new instance of the <see cref="ToolChoice"/> class.</returns>
+  protected ToolChoice(string type)
+  {
+    Type = type;
+  }
+}