Alias functions

We should have utils for computing the L2 alias of an L1 contract callers to the portal https://github.com/ethereum-optimism/optimism/blob/d8501a7fc58ce8887e22f83abcf7f0ebecfb1a89/packages/core-utils/src/optimism/alias.ts#L21-L39

https://github.com/ethereum-optimism/optimism/blob/develop/packages/contracts-bedrock/src/L1/OptimismPortal.sol#L407

Start with the referenced alias.ts implementation and OptimismPortal.sol entry point, then locate the corresponding utility area in op-viem. Confirm the L1-to-L2 alias behavior against those references; done means callers can use utilities that compute the L2 alias of an L1 contract.

Written by the indexing model from the issue text.