* feat(api): feature flags with multi variants
* feat(api): feature flags with multi variants - description optional
* feat(api): feature flags with multi variants - check for sum of rollout percentage
* feat(api): feature flags with multi variants - refactor
* feat(api): feature flags with multi variants - fix payload format
* feat(api): feature flags - test cases
* fix((ui): multi variants payload validation
* feat(api): feature flags - removed name
* feat(api): feature flags - removed name
* feat(api): feature flags - removed name