[Feature Request] Add option for a clock-ticking sound when the pomodoro timer is running

Certain pomodoro apps such as superproductivity contain options to enable a clock-ticking sound that plays every second in the background when the timer is running, since it helps to prevent onself from straying off focus. Would it be possible to add such a feature to this plugin?

The issue does not identify files, tests, or a plugin entry point. Start by locating the pomodoro timer plugin and its existing timer and sound behavior, then determine how a per-second ticking option should be configured and verified.

Written by the indexing model from the issue text.