list files in storage

As a user of the hyper storage service REST API and hyper connect SDK,
I'd like to list all the files in a storage service instance/bucket
so that I can view all the files in a bucket including the following information on each item within a bucket:

- item name
- location/folder
- size
- file extension

Related #442

Start by locating the storage service REST API and the hyper connect SDK entry points, then review related issue #442 for context. Trace how storage instances and buckets are exposed, and define completion as listing bucket items with name, location, size, and file extension in both interfaces.

Scritto dal modello di indicizzazione a partire dal testo della issue.