Add standard audit fields to all entities

Oqtane.Shared/Models/Alias.cs

@@ -1,14 +1,21 @@
-using System.ComponentModel.DataAnnotations.Schema;
+using System;
+using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Oqtane.Models
 {
-    public class Alias
+    public class Alias : IAuditable
     {
         public int AliasId { get; set; }
         public string Name { get; set; }
         public int TenantId { get; set; }
         public int SiteId { get; set; }
 
+        public string CreatedBy { get; set; }
+        public DateTime CreatedOn { get; set; }
+        public string ModifiedBy { get; set; }
+        public DateTime ModifiedOn { get; set; }
+
+
         [NotMapped]
         public string Scheme { get; set; }