Feature request: multiple timers and stopwatches

[afiorillo]

Hi!

I'm a big fan of time.fyi and like how it's grown over the past few months. Especially when cooking, I like to use multiple timers (e.g. something in the oven, simmering something else in a pot) and sometimes also multiple stopwatches. It would be a nice enhancement to support multiple concurrent timers and stopwatches, each perhaps given a short label.

Also I notice that the timer and stopwatch both reset when leaving the page. I can imagine implementing a service worker and local persistent storage to track the active timers is probably a huge undertaking, but accidentally resetting a timer is very easy as-is.