Add a shorthand notation for tuplets in alphaTex

[cheap-glitch]

Description

It often happens that several dozens notes in a row will be arranged in tuplets (usually triplets). Therefore it would be useful to have some kind of shorthand in order to apply tuplet logic to a whole slew of notes — similar to the way :8 defines all the following notes as eight notes.

So instead of writing

:8 1.3{tu 3} 2.3{tu 3} 3.3{tu 3} 1.2{tu 3} 2.2{tu 3} 3.2{tu 3} 1.1{tu 3} 2.1{tu 3} 3.1{tu 3}

one could write

:8{tu 3} 1.3 2.3 3.3 1.2 2.2 3.2 1.1 2.1 3.1

which is arguably both faster to type and easier to read.

Current Workarounds

I guess it would be possible to write a parser to extend the alphatex before feeding it to alphatab, but it seems like reinventing the wheel.

[Danielku15]

Sounds like a good idea and should be quite easy to implement.

[Danielku15]

The shorthand notation for tuplets is now available in build 0.9.3.169.
https://docs.alphatab.net/develop/alphatex/beat-effects#tuplet-ranges