feat(hover): add formattimecallback option

[Adrii77]

Short description

Add formatTimeCallback option for Hover plugin

Implementation details

Reuse previous formatTime method as a new option named formatTimeCallback.

How to test it

• yarn start
• Go to Hover plugin's page on the app
• Hover the waveform to see plugin's working
• In Hover.create object in params, add

formatTimeCallback(time) {
            const hours = Math.floor(time / 3600);
            const minutes = Math.floor((time % 3600) / 60);
            const seconds = Math.floor(time % 60);

            const formattedTime = [hours, minutes, seconds]
              .map(value => (value < 10 ? `0${value}` : value))
              .join(':');

            return formattedTime;
          },

• Hover the waveform to see time label as "hh:mm:ss"

Checklist

• This PR is covered by e2e tests
• It introduces no breaking API changes

[katspaugh]

Perfect, thank you! 🙏