Utility for deploying account in tests

[cptartur]

In some cases, user might want to invoke a contract through an account.
It is possible to do so in forge already be deploying an account contract and making invokes through it.

This however requires setting up the account by importing an account contract and then declaring and deploying it.

Add an utility function that will declare and deploy a predefined account that can be used in tests. For that, we can utilize e.g. an account from OZ repo.

[piotmag769]

Wouldn't a dedicated section in docs be better? Do we want to bundle OZ or any other contract with snforge? Seems a bit excessive to me

[cptartur]

Wouldn't a dedicated section in docs be better? Do we want to bundle OZ or any other contract with snforge? Seems a bit excessive to me

Don't think bundling a contract would increase the binary size significantly or cause other problems. But this is to be discussed.

Docs don't resolve this entirely.