Pass useCatch data to the MetaFunction

[runoncedev]

Right now there is no way to tell if a Response has been thrown (by some loader, etc) inside the MetaFunction.

I think this feature could be useful to render different meta tags depending on the response. E.g. rendering <title>Page not found</title> in case of a 404 response.

As a workaround, I'm checking for !data to render a different title, but it's not the most reliable solution I think.