This is an odd request, but is there a font out there that is just boxes that is boxes with the code point inside. And how would I go about making one. Are there any tricks with fonts that allow a different path than just generating each box with the code point inside for each character. What I'm trying to do is make zero width joiner characters visible, but not replace the character itself. This was one of the ways I thought to do it, but I'd be open to suggestions.
Specifically I want to make something close to the one in the top bar.