Integrate connectivity features and enhance UI responsiveness

This update introduces several enhancements related to connectivity monitoring and user interface improvements. Key changes include:

• Added connectivity_plus package for improved network connectivity handling.
• Implemented InternetConnectionMonitor to wrap the main app, providing real-time connectivity status updates.
• Enhanced snackbar notifications to inform users about connectivity changes, including no internet and connection restored messages.
• Updated translations for connectivity-related messages in both Arabic and English.
• Refactored app lifecycle management to check connectivity status when the app resumes.

These changes aim to improve user experience by providing timely feedback on network status and ensuring a more responsive application.