De-couple utils lib from crypto protocol libs

[jmrossy]

Problem

The utils lib requires a crypto lib for each protocol support (Ethers for Evm, Solana Web3, CosmJS). The primary use case is for address validation and formatting (see src/addresses.ts) but Ethers is used in a few other places too.

This dependency will prohibit the effective design of a plugin-based architecture for protocols and will continue to inflate the utils package size as more protocols are added.

Solution

Either replace the uses of those libs with custom code or move the offending code (e.g. addresses.ts) to the SDK.