Countdown Timer

A console-based countdown timer built with Dart, allowing users to set a duration (hours, minutes, seconds) and watch it count down in real-time. The timer supports pausing, resuming, and quitting via keyboard inputs, with time displayed in HH:mm:ss format using the intl package.

Features

• Customizable Duration: Set countdown duration in hours, minutes, and seconds.
• Real-time Display: Updates every second, showing remaining time as HH:mm:ss.
• Pause/Resume: Press p to pause, r to resume.
• Quit Option: Press q to terminate the countdown.
• Input Validation: Ensures non-negative integers and valid format.
• Dependency:
  • intl: ^0.19.0 for timestamp formatting.

Project Structure