refactor: Use more ox

[shazow]

1. keccak

(ox)[https://oxlib.sh/] exposes Hash, so we can get rid of calling import { keccak_256 } from '@noble/hashes/sha3'; directly, so we won't need to worry about the peerDependency.

In general can probably move most of https://github.com/shazow/whatsabi/blob/main/src/utils.ts into using ox instead.

2. stronger typing

I've been meaning to add more abitype-style types throughout WhatsABI, now it's a bit easier because we can use ox's exposed types too. For example, import type Address from "ox/Address" should get us that.