feat(xanthous): Allow selecting hand for wielding

When wielding items, allow selecting which hand the item should be
wielded in.

Currently this has no actual effect on the mechanics of combat - that'll
come next.

Change-Id: Ic289ca2d8fa6f5fc0ad5bd0b012818a3acd8599e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5470
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI

users/grfn/xanthous/src/Xanthous/messages.yaml

@@ -115,8 +115,8 @@ wield:
     - You can't wield anything in your backpack
     - You can't wield anything currently in your backpack
   menu: What would you like to wield?
-  # TODO: use actual hands
-  wielded : You wield the {{wieldedItem.itemType.name}} in your right hand.
+  hand: Wield in which hand?
+  wielded: You wield the {{item.wieldedItem.itemType.name}} in {{hand}}
 
 fire:
   nothing: