Bluesky app fork with some witchin' additions 馃挮 forked from jollywhoppers.com/witchsky.app

Initial feature gating and A/B testing integration (#3122) master

* Add statsig dependency * Add SDK provider * Move to separate file, add tier and hashing * Disable local storage for now * Add initial gate testing fixture * Fork for web just in case * More WIP * wip * Rm test gate * Add shim on native * Clarify