Initial commit: JDE Scoping Tool migration project

Set up repository with legacy .NET Framework 4.8 source (OLD/),
new .NET 10 Blazor solution (NEW/), OpenSpec specifications,
documentation, and project configuration.

OLD/DataModel/Models/Item.cs

@@ -0,0 +1,65 @@
+using System;
+using DataModel.Helpers;
+using DataModel.ViewModels;
+
+namespace DataModel.Models
+{
+    /// <summary>
+    /// JDE item (part type) unit model
+    /// </summary>
+    public class Item
+    {
+        /// <summary>
+        /// Item unique short number
+        /// </summary>
+        public long ShortItemNumber { get; set; }
+
+        /// <summary>
+        /// Item unique number
+        /// </summary>
+        public string ItemNumber { get; set; }
+
+        /// <summary>
+        /// Item description
+        /// </summary>
+        public string Description { get; set; }
+
+        /// <summary>
+        /// Item master planning family
+        /// </summary>
+        public string PlanningFamily { get; set; }
+
+        /// <summary>
+        /// Item master stocking type code
+        /// </summary>
+        public string StockingType { get; set; }
+
+        /// <summary>
+        /// Date of last update to record
+        /// </summary>
+        private int LastUpdateDate { get; }
+
+        /// <summary>
+        /// Time of day of last update to record
+        /// </summary>
+        private int LastUpdateTime { get; }
+
+        /// <summary>
+        /// Timestamp of last update to record
+        /// </summary>
+        public DateTime LastUpdateDT => LastUpdateDate.FromJDEDate().FromJDEDateTime(LastUpdateTime);
+
+        /// <summary>
+        /// Converts object to view model
+        /// </summary>
+        /// <returns>Projected view model for object</returns>
+        public ItemViewModel ToViewModel()
+        {
+            return new ItemViewModel()
+            {
+                ItemNumber = ItemNumber,
+                Description = Description
+            };
+        }
+    }
+}