Add legacy VoteStreak migration, recurring flag, and admin migrate command#1507

BenCodez wants to merge 2 commits intomasterBenCodez/VotingPlugin:masterfrom

codex/expand-votestreak-system-for-one-time-rewards-hlf3waBenCodez/VotingPlugin:codex/expand-votestreak-system-for-one-time-rewards-hlf3waCopy head branch name to clipboard