Since this was added after sans serif and fp6 icon, users can only provide fallback fonts for non-existing glyths

I will provide an option for the ordering

@kianmeng Hi! Could you take a review for this PR?
IMO it would be better to have custom font settings without users manually workaround. For example, the custom_fonts argument could work for imgui, and possible future UI backends.

Also, my first try of workaround didn't work, though I didn't dive it deeper, I did the same steps as what was in fastplotlib to push_font.

@mokurin000 Not project owner, you can always ping @kushalkolar and @clewis7 ?

@mokurin000 Not project owner, you can always ping @kushalkolar and @clewis7 ?

Ahh sorry for accident mention, I mistaken identity of him