Complete Phase 4: Comprehensive preferences, localization, and UX polish

- Rename application from MenuWhisper to Tell me with new domain com.fmartingr.tellme
- Implement comprehensive preferences window with 6 tabs (General, Models, Text Insertion, Interface, Advanced, Permissions)
- Add full English/Spanish localization for all UI elements
- Create functional onboarding flow with model download capability
- Implement preview dialog for transcription editing
- Add settings export/import functionality
- Fix HUD content display issues and add comprehensive permission checking
- Enhance build scripts and app bundle creation for proper localization support

Sources/App/TellMeApp.swift

@@ -0,0 +1,26 @@
+import SwiftUI
+import CoreUtils
+
+class AppDelegate: NSObject, NSApplicationDelegate {
+    private let appController = AppController()
+
+    func applicationDidFinishLaunching(_ notification: Notification) {
+        appController.start()
+    }
+}
+
+@main
+struct TellMeApp: App {
+    @NSApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
+
+    var body: some Scene {
+        // Use a hidden window scene since we're using NSStatusItem for the menu bar
+        WindowGroup {
+            EmptyView()
+        }
+        .windowStyle(.hiddenTitleBar)
+        .windowResizability(.contentSize)
+        .defaultSize(width: 0, height: 0)
+    }
+}
+