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.

NEW/src/JdeScoping.Core/Options/SearchOptions.cs

@@ -0,0 +1,8 @@
+namespace JdeScoping.Core.Options;
+
+public class SearchOptions
+{
+    public int MaxResultRows { get; set; } = 100000;
+    public int TimeoutSeconds { get; set; } = 300;
+    public int MaxConcurrentSearches { get; set; } = 5;
+}