* feat: migrate from aiErrorAssist naming for disabling AI features to aiFeatures.enabled to avoid confusion
feat: keep aiErrorAssistant as setting on user object until migration is run
* feat: migrate writefull.enabled unset to instead use promotionSet false
* feat: updating to use quota based system for AI usage
* feat: hide relevant sections of quota system behind split test
* feat: ship onAiFreeTrial instead of free quota amount to project meta
* fix: renaming splitTestEnabledForUser to featureFlagEnabledForUser
* fix: v1_personal should have free trial amount of ai quota
* fix: onAiFreeTrial in projectController should account for anonymous users with no features
* feat: fixing marketing exports for ai quotas
* feat: update features epoch
* feat: move to quota tiers, and map tier to numeric allowance within rateLimiters
GitOrigin-RevId: 17763447965aae5777053b783d2601517bfe6b12