[ERFC - 375] Anonymity in MACI

MACI - Minimal Anti-Collusion Infrastructure is a collection of smart contracts, ZK circuits and ts packages that we can use to build programs on top. We have already dealt with this topic, we summarized what has been done in MACI so far. More information about MACI can be found in our previous research (MACI [1]) and blog (Can MACI really destroy the collusion? [2]).