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/Database/Tables/Item.sql

@@ -0,0 +1,16 @@
+CREATE TABLE [dbo].[Item]
+(
+    [ShortItemNumber] BIGINT NOT NULL,
+	[ItemNumber] VARCHAR(25) NOT NULL, 
+    [Description] VARCHAR(30) NULL,
+	[PlanningFamily] VARCHAR(3) NULL,
+	[StockingType] CHAR(1) NULL,
+	[LastUpdateDT] DATETIME NOT NULL, 
+    CONSTRAINT [PK_Item] PRIMARY KEY CLUSTERED([ShortItemNumber])
+)
+
+GO
+
+CREATE INDEX [IX_Item_ItemNumber] ON [dbo].[Item]([ItemNumber])
+
+GO