fix(error): Fix error passthrough in queued tasks

[az0uz]

fixes #140

Errors being thrown by chunkGetItem (and underlying storage requests) are uncaught.

The use of the PQueue class will both emit an error event and throw if awaiting the Promise returned by the queue.add method.

To prevent this issue, I created an array of queue.add promises, and await for all those promises instead of using queue.onIdle().

Using the error event will still be considered as uncaught errors since nothing is awaiting the queue.add promises.

[az0uz]

Right now, when there is a network issue in a chunk request, the get will still complete and return data, with that errored chunk data containing zeros, this change will fix that, and correctly throw on that method if any of the chunk requests errored. This will also throw the underlying AbortError when passing an AbortSignal to the Store through StoreOptions.

[toloudis]

I can confirm this is fixing a bug we have in our attempt to write a proxy Store to cache chunk requests.