Added assistant plugins (#659)

app/MindWork AI Studio/Tools/PluginSystem/Assistants/DataModel/StatefulAssistantComponentBase.cs

@@ -0,0 +1,30 @@
+using System.Text;
+
+namespace AIStudio.Tools.PluginSystem.Assistants.DataModel;
+
+public abstract class StatefulAssistantComponentBase : NamedAssistantComponentBase, IStatefulAssistantComponent
+{
+    public abstract void InitializeState(AssistantState state);
+    public abstract string UserPromptFallback(AssistantState state);
+    
+    public string UserPrompt
+    {
+        get => AssistantComponentPropHelper.ReadString(this.Props, nameof(this.UserPrompt));
+        set => AssistantComponentPropHelper.WriteString(this.Props, nameof(this.UserPrompt), value);
+    }
+
+    protected string BuildAuditPromptBlock(string? value)
+    {
+        var builder = new StringBuilder();
+        var fieldName = this.Type.ToString().ToLowerInvariant();
+        
+        builder.AppendLine($"[{fieldName}]");
+        builder.Append("name: ").AppendLine(this.Name);
+        builder.AppendLine("context:");
+        builder.AppendLine(!string.IsNullOrEmpty(this.UserPrompt) ? this.UserPrompt : "<not provided>");
+        builder.AppendLine("value:");
+        builder.AppendLine(!string.IsNullOrEmpty(value) ? value : "<empty>");
+        builder.Append($"[/{fieldName}]").AppendLine().AppendLine();
+        return builder.ToString();
+    }
+}