Add custom names support for `debug`

[AlexandrHoroshih]

Sometimes it is needed to log some unit updates with custom naming, so it is easier to read them in context

It can be simply achieved by using object shape:

debug({
 brokenStore: $a,
 someEvent: abc
})

debug({
  trace: true
}, {
 brokenStore: $a,
 someEvent: abc
})

Keys of the object will be treated as custom names for these units

Also there is maybe a need to provide custom name for some unit, which is logged not directly, but via tracing:

const $abc = combine([$a, $b, $c])

sample({
 clock: $abc,
 target: someEvent
})

debug({
  trace: true,
  names: {
     customStoreName: $abc,
  }
}, someEvent)

// debug will log someEvent's updates traces with $abc named as customStoreName

[sergeysova]

I think the first form can be error-prone because it conflicts with the first argument as a config.

debug({
 brokenStore: $a,
 someEvent: abc,
})