A Command that allows the author to give a hook a computed tag name.
You may notice that it isn't possible to attach a nametag to hooks with commands
already attached - in the case of
(font:"Museo Slab")[The Vault]<title|, the nametag results
in an error. This command can be added with other commands to allow the hook to be named:
(font:"Museo Slab")+(hook: "title").
Furthermore, unlike the nametag syntax, (hook:) can be given any string expression:
(hook: "eyes" + (string:$eyeCount)) is valid, and will, as you'd expect, give the hook
the name of
$eyeCount is 1.