Make the app fullscreen PWA

[dnafication]

https://nextjs.org/docs/app/building-your-application/configuring/progressive-web-apps

Description: We would like to enhance the Talk Timer application by making it a Progressive Web App (PWA). This will allow users to install the app on their devices and use it offline, providing a more seamless and integrated experience.

Benefits:

• Offline Access: Users can access the timer even without an internet connection.
• Installable: Users can install the app on their home screen for quick access.
• Improved Performance: Faster load times and better performance due to caching.
• Enhanced User Experience: A more native app-like experience.