[AIP-19] Implemented Shield Voting

Background:

Snapshot has a privacy voting system called "Shielded voting" in which the voters choices are private during the voting period and get revealed when the proposal closes.

For more info, please refer to this article: https://snapshot.mirror.xyz/yGz91njKbw-sXsnAT6RkoMzPwvuddZritz37h1OWO8o

Rationale:

Shielded voting should make the voting process more fair by

• Prevents the voting process itself from influencing the vote results
• Encourage voter participations and prevent people from thinking it is pointless or useless to vote given the current live results

Implementation

If passed, all future Governance votes will be shielded.

Voting

This AIP will be a single-choice voting. There will be two voting options:

1. Implement shielded voting for future Governance votes.
2. Keep the voting as is.