True once LaunchDarkly holds flags for a real context. The provider starts on an anonymous
context and only switches when identify completes, so flags read before then are the
anonymous user's, not the signed-in user's.
Calls listener when isIdentified turns true; returns the unsubscribe.
Browser LaunchDarkly client. Holds configuration for
FeatureFlagProviderfrom@repo/feature-flags/reactand exposes imperativeidentify/isEnabled/getVariationmethods for use outside of React hooks. The underlyingLDClientis bound by the React provider once initialized; calls made before binding are either queued (identify) or return the supplied default (isEnabled,getVariation).