SDK: Streamline interfaces

[AlexNi245]

The goal of the SDK is to make its inner workings adjustable. Therefore Key features have to be abstracted behind interfaces so 3rd party developers are able to provide their own implementation.

Please place the following application features behind an interface. This items have been defined in advanced but are not meant to be a completed list. Dependencies that are occurring during development should also be abstracted away

• StorageApi (already done via lib/storage)
• Web3Provider -> abstract the logic of the internal Ethereum mainnet provider (useMainnetProvider at the FE). With a high degree of certainty only the providers.resolveName and providers.getResolver()
• Authentication. This is the biggest task since it covers the entire profile creation and publishing flow.