Added chat templates (#474)

app/MindWork AI Studio/Tools/ChatTemplateExtensions.cs

@@ -0,0 +1,13 @@
+using AIStudio.Settings;
+
+namespace AIStudio.Tools;
+
+public static class ChatTemplateExtensions
+{
+    public static IEnumerable<ChatTemplate> GetAllChatTemplates(this IEnumerable<ChatTemplate> chatTemplates)
+    {
+        yield return ChatTemplate.NO_CHATTEMPLATE;
+        foreach (var chatTemplate in chatTemplates)
+            yield return chatTemplate;
+    }
+}