Initial scaffold: context-aware notes app for iOS + macOS

XcodeGen project (Notes / NotesMac / NotesTests), Swift 6 strict concurrency,
iCloud-document storage via IndieSync with a SwiftData cache, automatic
capture context (location, place, time zone, device) on every note,
context-based relevance ranking with a 'Right here, right now' shelf,
tags, search, and the square.and.pencil-on-red app icon.

Notes/AppServices/AppServices.swift

@@ -0,0 +1,24 @@
+import Foundation
+import SwiftData
+
+/// Owns all service objects; created asynchronously at launch and injected
+/// into the SwiftUI environment.
+@Observable
+@MainActor
+final class AppServices {
+    let modelContainer: ModelContainer
+    let syncEngine: SyncEngine
+    let contextService: ContextService
+
+    init() async {
+        let container = NotesModelContainer.make()
+        self.modelContainer = container
+        self.syncEngine = SyncEngine(modelContainer: container)
+        self.contextService = ContextService()
+    }
+
+    /// Slow startup work (iCloud container discovery) — runs after the UI is up.
+    func startDeferredServices() async {
+        await syncEngine.connect()
+    }
+}