Function linkedlist-zippub

Source
:fn(pub) linkedlist-zip ( (LinkedList a) (LinkedList b)  (LinkedList (Pair a b)) )
Description

.zip — free-fn form. Methods dispatch on Self and .zip would collide with Zippable once that trait is wired onto LinkedList; until then the free fn keeps the surface reachable without deciding the Zippable question. Pairs elements positionally; result length is min(a.len, b.len).