It would be really nice to have! :-)
And I would really like to add it.. but .. I am not yet sure how, though. There's some finesse involved in not-planning fluid pipes in certain locations to keep space for a heat pipe, that I don't really know how to translate to code.
Once (.. if .. ) I figure it out, I'll make sure to add it. But I wouldn't get your hopes up.
Thank you for the suggestion though. It motivates me to think a little harder on it.