Implementing caesura and breath marks

[AurisStd]

Breath marks would be especially helpful, especially in wind and orchestral sheet music, seeing as they are fairly prominent.

[Danielku15]

I'd say this is on the roadmap (hidden) as part of #2051
Depending on how urgent this feature would be for you, I could schedule these specific articulations earlier.

I assume you mainly use MusicXML as input format? I'd eventually also add it to alphaTex of course.