Boil down vmap! variants, extend to reduce & mapreduce

There's a whole menagerie of vmap-related functions exported, corresponding to mutating/non-mutating, temporal/non-temporal stores, and singlethreaded/multithreaded. Eight versions of the same function are maintainable, but if some other boolean switch is added, that's sixteen, which could get unwieldy. Wrapper types might allow for a more Julian interface - something like

map!(Threaded(+), Nontemporal(out), a, b)

to replace

vmapntt!(+, out, a, b)

The introduction of Threaded(f) could be extended to reduce & mapreduce for a simple multithreaded reduction interface.

Commencez par lire les points d’entrée liés à vmap déjà exportés, notamment vmapntt!, ainsi que les interfaces reduce et mapreduce. Définissez comment des types wrapper tels que Threaded et Nontemporal doivent remplacer les variantes actuelles, puis vérifiez que l’API map! consolidée et les réductions Threaded préservent le comportement existant.