Native Implementation of EIP1962

[fedejinich]

As part of a new Precompiled contract set we need a native implementation of BLS12-381 curve operations

This library has been used by

• parity
• Besu
• Geth (as inspiration)

So we'll be probably using the same.

Also there is a besu java JNA implementation of that library. I think we should use it instead of using a JNI approach, that will make this repo easier to maintain, but first we need a sec review.

PS: if we go with JNA path we can take advantage and remove JNI bindings for secp256k1