Make SDK more Pythonic

[gonzalezzfelipe]

As it stands, the sdk is not really Pythonic, it follows more the Typescript way of doing things. For example

from offchain import Client

protocol = Client(options={"endpoint": "http://localhost:8888"})

should be

from offchain import Client

protocol = Client(endpoint="http://localhost:8888")

Bundling the parameters in a type is more of a typescript thing and not really pythonic.