chat-hook: handle watch-nack for /store wires too
Similar to /backlog wires, we want to emulate %remove behavior on-nack.
?~ saw [~ state]
?+ wir [~ state]
[%store @ *]
- [~ state(synced (~(del by synced) t.wir))]
+ (poke-chat-hook-action %remove t.wir)
::
[%backlog @ @ @ *]
=/ pax `path`(oust [(dec (lent t.wir)) 1] `(list @ta)`t.wir)
