Add access to a baseline

[Libric0]

Hello,
Thank you very much for this library, it is amazingly useful. One problem that I am having is, that I cannot combine multiple equations and text within the same Inline span without it jumping around vertically. Here is a small example:

The most likely cause of this is, that the Math widgets don't really have a defined baseline and are therefore added in by a heuristic, like centered or aligned to the bottom. That's where problems arise: If I have one equation that has all its symbols above the text-baseline, it will be rendered correctly. However, if I put a simple f, or a sum with limits right next to it in another math widget, all symbols within that equation will be shifted, because now the bottom of the widget, which currently can be regarded as the effective baseline, is in another place

Is there a fix for this issue working right now and I havent found it, or would that need further development? I would assume that within the simple club app, this could become problematic as well