* Add traits for witness and committed instance
* Implement witness and committed instance traits for Nova and HyperNova
* Implement witness and committed instance traits for ProtoGalaxy
* Improve the clarity of docs for `Witness{Var}Ext::get_openings`
* Avoid cloning `z_i`
* Fix grammar issues
* Rename `Ext` traits for committed instances and witnesses to `Ops`
* Implement `to_sponge_bytes`
* Parallelize vector and matrix operations
* Implement convenient methods for `NonNativeAffineVar`
* Return `L_X_evals` and intermediate `phi_star`s from ProtoGalaxy prover.
These values will be used as hints to the augmented circuit
* Correctly use number of variables, number of constraints, and `t`
* Fix the size of `F_coeffs` and `K_coeffs` for in-circuit consistency
* Improve prover's performance
* Make `prepare_inputs` generic
* Remove redundant parameters in verifier
* Move `eval_f` to arith
* `u` is unnecessary in ProtoGalaxy
* Convert `RelaxedR1CS` to a trait that can be used in both Nova and ProtoGalaxy
* Implement several traits for ProtoGalaxy
* Move `FCircuit` impls to `utils.rs` and add `DummyCircuit`
* `AugmentedFCircuit` and ProtoGalaxy-based IVC
* Add explanations about IVC prover and in-circuit operations
* Avoid using unstable features
* Rename `PROTOGALAXY` to `PG` to make clippy happy
* Fix merge conflicts in `RelaxedR1CS::sample`
* Fix merge conflicts in `CycleFoldCircuit`
* Swap `m` and `n` for protogalaxy
* Add `#[cfg(test)]` to test-only util circuits
* Prefer unit struct over empty struct
* Add documents to `AugmentedFCircuit` for ProtoGalaxy
* Fix the names for CycleFold cricuits in ProtoGalaxy
* Fix usize conversion when targeting wasm
* Restrict the visibility of fields in `AugmentedFCircuit` to `pub(super)`
* Make CycleFold circuits and configs public
* Add docs for `ProverParams` and `VerifierParams`
* Refactor `pow_i`
* Fix imports
* Remove lint reasons
* Fix type inference
* Add in-circuit couterparts of util functions
* Support folding `CommittedInstance`s with `u` and `x`
* Initial implementation of protogalaxy verifier circuit
* Fix the edge case in `all_powers_var`
* Absorb `u` and `x` as well
* Fix imports
* Rename some test functions for clarity
* Format
* Avoid the use of magic numbers
winderica