[feature request] Add countdown in top bar of Mac

[pengzhenghao]

Hi there! I am very excited to find this project! I am wondering is it possible to add a countdown in the top bar? I think this is a useful feature that allows user to know how many time has elapsed.

For example, another pomodoro timer "Focus To-Do" add a countdown like:

Thanks!

[cristiean]

Second this

[hicaicai]

I agree