Add scan flow MVP and local Axiom skill workspace

This snapshot establishes the camera-to-result recognition flow and related tests while checking in the project skill/docs assets required for the configured local tooling.

StackDex/StackDexApp.swift

@@ -12,7 +12,7 @@ import SwiftData
 struct StackDexApp: App {
     var sharedModelContainer: ModelContainer = {
         let schema = Schema([
-            Item.self,
+            ConfirmedScanRecord.self,
         ])
         let modelConfiguration = ModelConfiguration(schema: schema, isStoredInMemoryOnly: false)