libtmux.query:order-by

Return a new query set stably ordered by native PREDICATE and KEY. PREDICATE and KEY are function objects or symbols naming global functions, each resolved once before sorting. Invalid designators signal LIBTMUX:INVALID-ARGUMENT. Their calls follow the STABLE-SORT callback contract. Sorting is eager and local, mutating only a private simple-vector copy. SET remains unchanged; items are shared and equal keys retain input order.