ETHdos fold

Follows the ideas of ETHdos (https://ethdos.xyz/blog), but using Folding Schemes.

It uses Sonobe under the hood, compiled to WASM.

Current version does not parallelize in wasm. Same execution can be run natively (no wasm), instructions in the repo.
In the same laptop, natively takes ~290ms per step, in-browser takes ~1700ms per step.

1. gen_params 4. verify_proof