Create interval method

[sergeysova]

const { tick, opened } = interval({ timeout: 300, start: event, stop: event });

sample({
  clock: tick,
  target: readTimeFx,
})

// or (bad example) but take an idea
$time.on(tick, () => Date.now())

Originally posted by @sergeysova in #152 (comment)

[sergeysova]

It is can be useful with time({ clock }) method:

const $now = time({ clock: interval({ timeout: 100, start, stop }).tick })

It reads as:

After start is triggered, each 100 ms update $now with a new Date. When stop is triggered disable updates