Monolithic math font with `MATH` table similar to stix2-math, xits-math and others

I can understand if this is out of the scope of katex-fonts, but I think it would help in trying to develop a mobile complement to KaTeX with consistent fonts.

**Background:** Currently, [iosMath](https://github.com/kostub/iosMath) and [AndroidMath](https://github.com/gregcockroft/AndroidMath) read font metrics directly from font files with `MATH` tables (e.g. `xits-math.otf` and `texgyretermes-math.otf` in the repos). These work just as effectively with the [`stix2-math` font](https://github.com/stipub/stixfonts) although the metrics are not quite so ideal.

**Request:** I was wondering whether it was possible to generate a monolithic KaTeX font with `Math` tables so that it would work with these mobile apps. I'd appreciate any pointers to generate such a thing.