The implement of as `s` or `ms` to the basic time unit.

[sheepbox8646]

As you can see, in ./packages/core/src/config.ts, we have reserved a optional argument named unit, user can set it to 'frame' | 's' | 'ms', please implement the s and ms unit.

note

Don't touch Widget, just let the elapsed's unit changed

[sheepbox8646]

Has been implemented