Implement OVA NIFS (#163)

* feat: Basic Ova NIFS impl working

The implementation follows the spec outlined by Bunz in:
https://hackmd.io/V4838nnlRKal9ZiTHiGYzw?view.

With this, the NIFS works and passes all tests.

* chore: Resolve all TODOs and warnings

* add: Docs for the NIMFS of the scheme and related structs

* chore: update imports

* add: Docs for all Ova NIFS functions

* fix: Unify nomenclature for all variables and elements within NIFS tests

* fix: Uniformize instance order in fn calls

* chore: pass clippy

* chore: clear all clippy findings in tests

* chore: Remove `mimc` from spelling checks

* chore: Address PR reviews

folding-schemes/src/folding/nova/decider_eth.rs

@@ -402,7 +402,7 @@ pub mod tests {
         let start = Instant::now();
         let verified = D::verify(
             decider_vp.clone(),
-            nova.i.clone(),
+            nova.i,
             nova.z_0.clone(),
             nova.z_i.clone(),
             &nova.U_i,
@@ -516,7 +516,7 @@ pub mod tests {
         let start = Instant::now();
         let verified = D::verify(
             decider_vp.clone(),
-            nova.i.clone(),
+            nova.i,
             nova.z_0.clone(),
             nova.z_i.clone(),
             &nova.U_i,