feat: update storage initiation

[AmeanAsad]

Description

This PR addresses: https://github.com/filecoin-saturn/project-tracking/issues/161

The PR changes the storage interface to act as a factory function for storage. This means when we inject storage as a dependency, it returns a function which initiates the storage vs returning the storage getters, setters, etc. right away.

What this improves:

• Any smart client functionality relies on some form of storage dependency to work. If we inject a storage dependency that is faulty, we must detect that as early as possible and replace it with a memory storage instance.
• This allows us to catch issues with storage loading before attempting to utilize any storage functionality.

[guanzo]

I think the only change we need is to wrap the factory function call in a try/catch and make sure we fallback to memory storage if it errors or is missing. The rest of the changes that add inner functions aren't needed imo.