Create ECDSA verify and sign utilities

[critesjosh]

Problem

ECDSA verify and sign utilities don't currently exist in Noir. Adding these would make it easier to integrate Ethereum account information into circuits.

Solution

Write ECDSA verify and sign utilities in Noir.

Additional context

We will consider giving a grant to do this.

[nfurfaro]

@critesjosh Has there been any progress on this? I could be interested in working on it if not.

[critesjosh]

This is actually cpmplete. You can see how to use it here. https://noir-lang.org/standard_library/cryptographic_primitives/ecdsa_secp256k1