Use fully-qualified KitchenReceipt namespace for Gang, Dish, and DishModifications in BuildSampleKitchenReceipt and BuildSampleKitchenReceiptNextDish to resolve CS0104 errors caused by identical type names in BarReceipt and KitchenReceipt namespaces. Add global.json to pin SDK to .NET 8.0 for compatibility with .slnx. Co-Authored-By: Paperclip <noreply@paperclip.ing>