Refactored chat requests (#607)

app/MindWork AI Studio/Provider/IMessageBase.cs

@@ -0,0 +1,14 @@
+namespace AIStudio.Provider;
+
+/// <summary>
+/// The none-generic base interface for messages exchanged with AI models.
+/// </summary>
+public interface IMessageBase
+{
+    /// <summary>
+    /// Gets the role of the entity sending or receiving the message.
+    /// This property typically identifies whether the entity is acting
+    /// as a user, assistant, or system in the context of the interaction.
+    /// </summary>
+    public string Role { get; init; }
+}