Added chat templates (#474)

app/MindWork AI Studio/Settings/ChatTemplate.cs

@@ -0,0 +1,38 @@
+using AIStudio.Chat;
+using AIStudio.Tools.PluginSystem;
+
+namespace AIStudio.Settings;
+
+public readonly record struct ChatTemplate(uint Num, string Id, string Name, string SystemPrompt, List<ContentBlock> ExampleConversation, bool AllowProfileUsage)
+{
+    private static string TB(string fallbackEN) => I18N.I.T(fallbackEN, typeof(ChatTemplate).Namespace, nameof(ChatTemplate));
+    
+    public static readonly ChatTemplate NO_CHATTEMPLATE = new()
+    {
+        Name = TB("Use no chat template"),
+        SystemPrompt = string.Empty,
+        Id = Guid.Empty.ToString(),
+        Num = uint.MaxValue,
+        ExampleConversation = [],
+        AllowProfileUsage = true,
+    };
+    
+    #region Overrides of ValueType
+
+    /// <summary>
+    /// Returns a string that represents the profile in a human-readable format.
+    /// </summary>
+    /// <returns>A string that represents the profile in a human-readable format.</returns>
+    public override string ToString() => this.Name;
+
+    #endregion
+    
+    public string ToSystemPrompt()
+    {
+        if(this.Num == uint.MaxValue)
+            return string.Empty;
+        
+        return this.SystemPrompt;
+    }
+
+}