* Implement Nova's Offchain-Decider circuits (on both curves)
  (curve1 circuit: ~152k constraints, curve2 circuit: ~8k constraints)
  following the enumeration of the Offchain Decider docs:
  https://privacy-scaling-explorations.github.io/sonobe-docs/design/nova-decider-offchain.html
* Update enumeration of checks in Onchain-Decider circuit
  (decider_eth_circuit.rs) to match the updated Onchain Decider docs:
  https://privacy-scaling-explorations.github.io/sonobe-docs/design/nova-decider-onchain.html