implement HyperNova's DeciderEth circuit (#132)

The HyperNova's DeciderEthCircuit follows a similar logic as Nova's one
described in
https://privacy-scaling-explorations.github.io/sonobe-docs/design/nova-decider-onchain.html
but adapted to HyperNova checks and values.

folding-schemes/src/folding/hypernova/mod.rs

@@ -10,6 +10,7 @@ use ark_std::{fmt::Debug, marker::PhantomData, rand::RngCore, One, Zero};
 
 pub mod cccs;
 pub mod circuits;
+pub mod decider_eth_circuit;
 pub mod lcccs;
 pub mod nimfs;
 pub mod utils;