feat: Enhance TTS player functionality and UI

- Added resume functionality to TTS player when paused.
- Display voice name or language in TTS player UI.
- Improved error handling in reader provider with debug messages.
- Updated TTS service to configure Vietnamese voice and handle platform-specific audio settings.
- Removed wakelock dependency and related code.
- Fixed search screen error handling.
- Updated settings screen to navigate to home after sign out.
- Improved splash screen with timer management.
- Enhanced main app error handling with logging.
- Removed unused package_info_plus and wakelock_plus dependencies.
- Added environment variable support for mobile runtime.
- Integrated Google Sign-In configuration for Android.
- Created logging observer for Riverpod providers.
- Added scripts for environment setup and Google Sign-In validation.

lib/main.dart

@@ -1,9 +1,39 @@
+import 'dart:async';
+import 'dart:ui';
+
 import 'package:flutter/widgets.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
 import 'app/app.dart';
+import 'core/logging/app_provider_observer.dart';
 
 void main() {
   WidgetsFlutterBinding.ensureInitialized();
-  runApp(const ProviderScope(child: ReaderApp()));
+
+  FlutterError.onError = (details) {
+    FlutterError.presentError(details);
+    debugPrint('[APP][FLUTTER_ERROR] ${details.exceptionAsString()}');
+    debugPrintStack(stackTrace: details.stack);
+  };
+
+  PlatformDispatcher.instance.onError = (error, stack) {
+    debugPrint('[APP][PLATFORM_ERROR] $error');
+    debugPrintStack(stackTrace: stack);
+    return true;
+  };
+
+  runZonedGuarded(
+    () {
+      runApp(
+        const ProviderScope(
+          observers: [AppProviderObserver()],
+          child: ReaderApp(),
+        ),
+      );
+    },
+    (error, stack) {
+      debugPrint('[APP][UNCAUGHT_ASYNC] $error');
+      debugPrintStack(stackTrace: stack);
+    },
+  );
 }