Implement a progress bar to show user's advancement through exercises

[thatvideoshopguy]

I'd like to suggest adding a progress bar feature to the repository. This would provide users with a visual representation of their progress through the exercises, offering them a sense of achievement and motivation to continue.

Current behaviour:

Currently, users do not have a clear indication of their overall progress through the exercise set, making it difficult for them to gauge how far they've come and how much they have left to complete.

Proposed feature:

• Implement a progress bar that is displayed in the terminal, showing the user's progress through the exercises.
• The progress bar should be updated dynamically as the user completes each exercise.
• Optionally, display the number of completed exercises and the total number of exercises (e.g., "5/20 exercises completed") alongside the progress bar for added clarity.

Benefits:

Adding a progress bar feature will give users a better understanding of their progress and help them stay motivated as they work through the exercises. It also provides a sense of accomplishment and encourages them to keep going until they complete the entire set.