Workouts 2.0: re-base persistence on iCloud Drive documents

Replace Core Data + NSPersistentCloudKitContainer + App-Group store +
WatchConnectivity dictionary sync with the QuickRabbit iCloud-documents
architecture:

- iCloud Drive JSON documents are the sole source of truth (one file per
  aggregate: Splits/<ULID>.json, Workouts/YYYY/MM/<ULID>.json), with a
  rebuildable SwiftData cache populated only by an NSMetadataQuery observer
  and a connect-time reconcile. Soft-delete tombstones; hard iCloud gate.
- Shared model layer (ULID, Codable *Documents + stateless mappers, @Model
  cache entities, SwiftData container) compiled into both targets.
- New iPhone<->Watch bridge over WatchConnectivity keyed by ULIDs; the phone
  is the sole writer of iCloud Drive, the watch round-trips documents.
- AppServices DI + iCloud-required root gate; Swift 6 strict concurrency.
- Starter splits generated on demand from the bundled YAML catalogs.
- Migrate to XcodeGen (project.yml), iOS 26 / watchOS 26; CloudDocuments
  entitlement (drop CloudKit/App Group/aps-environment).
- Duration stored as Int seconds (was a Date epoch hack); fix workout
  end-on-create, undismissable delete dialog, toolbar-hiding nav stacks,
  and the Settings placeholder.
- Add README/CHANGELOG/LICENSE, .gitignore, refreshed REQUIREMENTS, and the
  Scripts/ TestFlight pipeline (release.sh + ASC API scripts).

MARKETING_VERSION 2.0.

Workouts/WorkoutsApp.swift

@@ -1,31 +1,24 @@
 //
-// WorkoutsApp.swift
-// Workouts
+//  WorkoutsApp.swift
+//  Workouts
 //
-// Created by rzen on 8/13/25 at 11:10 AM.
+//  Copyright 2025 Rouslan Zenetl. All Rights Reserved.
 //
-// Copyright 2025 Rouslan Zenetl. All Rights Reserved.
-//
-
 
 import SwiftUI
-import CoreData
+import SwiftData
 
 @main
 struct WorkoutsApp: App {
-    let persistenceController = PersistenceController.shared
-    let connectivityManager = WatchConnectivityManager.shared
-
-    init() {
-        // Set up Watch connectivity with Core Data context
-        connectivityManager.setViewContext(persistenceController.viewContext)
-    }
+    @State private var services = AppServices()
 
     var body: some Scene {
         WindowGroup {
-            ContentView()
-                .environment(\.managedObjectContext, persistenceController.viewContext)
-                .environmentObject(connectivityManager)
+            RootGateView()
+                .environment(services)
+                .environment(services.syncEngine)
+                .modelContainer(services.container)
+                .task { await services.bootstrap() }
         }
     }
 }