* 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