[Feature] Show Pomodoro time remaining in the browser tab title

[devftkrshna]

Right now, if the user switches to another tab, they don't know how much time is left on their Pomodoro timer. Expected Behavior: When the timer is active, dynamically update the document.title to show the remaining time (e.g., (24:59) Focus - Seiri). When paused or stopped, revert back to Seiri