Lightroom Classic's keyboard shortcut page lists Option+0 / Option+Shift+0
(Alt+0 / Alt+Shift+0 on Windows) for cycling forward and backward through
the keyword sets; LightCraft had no key or command for it. Next Keyword
Set (keyword.nextSet, Alt+0) and Previous Keyword Set
(keyword.previousSet, Alt+Shift+0) make the set after or before the
current one current, in the Keyword Set menu's order: Recent Keywords,
then the saved sets. The keys wrap around at either end, and Alt+1 to
Alt+9 then apply the new set's keywords.
The two command labels have rows in every catalog. The KEYC-METADATA and
LRC-LIB-KEYWORDS rows, docs/ui-parity.md and docs/library-shortcuts.md
list the keys.