start new controllers

zero.Core/Models/ZeroEntityPreview.cs

@@ -0,0 +1,15 @@
+namespace zero.Models;
+
+[RavenCollection("Previews")]
+public class ZeroEntityPreview : ZeroEntity
+{
+  /// <summary>
+  /// Id of the original entity
+  /// </summary>
+  public string OriginalId { get; set; }
+
+  /// <summary>
+  /// Contains the entity content
+  /// </summary>
+  public ZeroEntity Content { get; set; }
+}