This is really more of a general curiosity question rather than support so no rush but thanks for letting me know.
It looks like you’re using something designed expressly for the documentation functionality and I checked through the header results to see if an obvious plugin was listed but I didn’t see anything (and you may have that filtered out), so thought I’d ask.
I am about at that same point. Everything I find is either overly complex with bloated functionality or the polar opposite. Do you have any interest in selling Tom’s theme?
Gotcha, if you think it will be released within the next month, that would work for me and I would be happy to help out by doing some beta testing on it for you, just let me know.