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/Controllers/SessionController.cs

@@ -0,0 +1,13 @@
+using System.Web.Mvc;
+
+namespace WebInterface.Controllers
+{
+    public class SessionsController : Controller
+    {
+        // GET: Sessions
+        public ActionResult Index()
+        {
+            return RedirectToActionPermanent("Index", "Search");
+        }
+    }
+}