logging Directory Reference

Files
	cerr_logger.h
	Always-available std::cerr logging backend.
	log_level.h
	Severity levels for the logging system.
	log_macros.h
	Iceberg-prefixed logging macros (ICEBERG_LOG_*).
	logger.h
	Pluggable logging interface and the process-global default logger.
	loggers.h
	Property-driven registry/factory for Logger backends.
	short_log_macros.h
	Opt-in bare LOG_* aliases for the ICEBERG_LOG_* macros.