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/WebInterface/Models/FileUploadResult.cs

@@ -0,0 +1,33 @@
+using System.Collections.Generic;
+
+namespace WebInterface.Models
+{
+    /// <summary>
+    /// Model for file upload result
+    /// </summary>
+    public class FileUploadResult<T>
+    {
+        /// <summary>
+        /// Whether or not upload was successful
+        /// </summary>
+        public bool WasSuccessful { get; set; }
+
+        /// <summary>
+        /// Error message generated
+        /// </summary>
+        public string ErrorMessage { get; set; }
+
+        /// <summary>
+        /// Data extracted from uploaded file
+        /// </summary>
+        public List<T> Data { get; set; }
+
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        public FileUploadResult()
+        {
+            Data = new List<T>();
+        }
+    }
+}