feature: replace snarks backend by plonk#38

Draft

lucasmenendez wants to merge 4 commits intomainfrom

f/replace_groth16_by_plonk

Commits on Feb 20, 2025

move vote verifier and aggregator circuit to plonk (inner aggregator proofs verification fails)
lucasmenendez
committed

Commits on Feb 21, 2025

explicit implementation of vk switching
lucasmenendez
committed

Commits on Feb 24, 2025