Add entrypoint to query zswap inputs/outputs

[andrew-fleming]

In order to check the zswap inputs and outputs, you currently have to use the old syntax of manually setting the circuit ctx within the wrapper and returning the ctx. To avoid this, there should be a way to view the zswap state from the simulator class. Otherwise, you have to do it like this:

  public unsafeMint(
    recipient: Either<ZswapCoinPublicKey, ContractAddress>,
    amount: bigint,
  ): CircuitResults<AccountPrivateState, CoinInfo> {
    // Using the older method for executing a call
    // in order to see the zswap details.
    // There should be a utility func(s) to make this easier
    // in the simulator package
    const res = this.contract.impureCircuits.unsafeMint(
      this.circuitContext,
      recipient,
      amount,
    );

    this.circuitContext = res.context;
    return res;
  }