Added documentation

app/MindWork AI Studio/Provider/IProvider.cs

@@ -3,10 +3,20 @@ using Microsoft.JSInterop;
 
 namespace AIStudio.Provider;
 
+/// <summary>
+/// A common interface for all providers.
+/// </summary>
 public interface IProvider
 {
+    /// <summary>
+    /// The provider's ID.
+    /// </summary>
     public string Id { get; }
 
+    /// <summary>
+    /// The provider's instance name. Useful for multiple instances of the same provider,
+    /// e.g., to distinguish between different OpenAI API keys.
+    /// </summary>
     public string InstanceName { get; set; }
     
     public IAsyncEnumerable<string> GetChatCompletion(IJSRuntime jsRuntime, SettingsManager settings, Model chatModel, Thread chatThread);