feat: add interfaces for each abstract contract used by the Starknet core contract

[tdelabro]

Starknet core contract is a contract deployed on Ethereum.
It is made of multiple abstract contracts, the list is defined here:

zaun/lib/starknet/Starknet.sol

Line 33 in 895b35f

contract Starknet is

Those abstract contract types, define interfaces with a list of methods callable on the contract. Some are internal, but others are external, view, pure, and payable, meaning that they can be triggered by transactions coming from the outer world.
We want our client to expose all of those.

I added some of them in #3. There is more to be added, just follow the way I did it: one abstract contract -> one file -> one abigen macro -> one trait -> one impl for AsRef<MyInterfaceType> -> one field in the client -> one imp of AsRef<MyInterfaceType> for MyClientType.

So go into each abstract contract, find the public method by hitting crtl+F, copy paste their signature in the abigen and then go with the flow

[Tidus91]

i would like to do this one :)

[tdelabro]

@Tidus91 all yours!