* Add multivariate pc support

* Integrate new polynomial interfaces

* Fix no_std

* Reduce code reuse

* Small optimizations

* Update for arkworks + tweaks

* Fix

* fmt

* Handle the conflict with `master` on sonic_pc

* Handle the upstream conflict

* Handle the conflict with the upstream

* Handle the conflict with the upstream

* Cargo fmt

* mul update; add serialization

* Update the references

* Reconcile the citation

* fix some missing points

Co-authored-by: Weikeng Chen <w.k@berkeley.edu>
Co-authored-by: oblivious-app <55861861+oblivious-app@users.noreply.github.com>