Add voice notes: on-device transcription, multi-language, watch capture

- Schema v2: Note.AudioInfo, .m4a sidecar next to the note JSON in iCloud
- AudioRecorderService (iOS/macOS) + SpeechAnalyzer transcription pipeline
  with enabled-language set and confidence-based auto-pick, re-transcribe menu
- Settings > Transcription > Languages with asset download/reserve handling
- watchOS app + accessory complication: one-button recorder, WCSession
  transferFile to phone, WatchInbox staging, direct-upsert ingestion
- Player UI, transcription status chips, quick-capture mic in notes list
- Version 0.2, changelog + README updated

Notes Watch App/NotesWatchApp.swift

@@ -0,0 +1,21 @@
+import SwiftUI
+
+@main
+struct NotesWatchApp: App {
+    @State private var services = WatchAppServices()
+    @Environment(\.scenePhase) private var scenePhase
+
+    var body: some Scene {
+        WindowGroup {
+            NavigationStack {
+                RecordView()
+            }
+            .environment(services)
+            .task { services.bootstrap() }
+            .onOpenURL { url in services.handleDeepLink(url) }
+        }
+        .onChange(of: scenePhase) { _, phase in
+            services.handleScenePhase(phase)
+        }
+    }
+}