Migrated projects to dotnet8

migrated all projects over to .net8
incomplete feature for gui shipments

src/bnhtrade.Core/Model/Account/Contact.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace bnhtrade.Core.Model.Account
+{
+    public class Contact
+    {
+        public int ContactId { get; set; }
+
+        public string ContantName { get; set; }
+
+        public string ContactEbayName { get; set; }
+
+        public string ContactEbayEmail { get; set; }
+
+        public string ContactPaypalName { get; set; }
+
+        public string ContactPaypalEmail { get; set; }
+
+        public DateTime Created { get; set; }
+
+        public DateTime? Modified { get; set; }
+    }
+}