Allow custom beaming rules

[Danielku15]

See #2387

Currently alphaTab has a fixed logic of beaming within the same "division" (quarter note):

alphaTab/packages/alphatab/src/rendering/utils/BeamingHelper.ts

Line 435 in 0730fd7

const division1: number = ((divisionLength + start1) / divisionLength) | 0 | 0;

alphaTab should allow customizing the automatic beaming. MuseScore handles this rule together with the time signature. in alphaTab it would likely be an information on masterbar level on how the beaming should be done for this and following masterbars.

To be prepared for other beaming related settings (see discussion) there should be a respective model object to control these bits. On settings level we could also support this beaming configuration as default-fallback in case no score specific option is set.

Guitar Pro also allows configuring the beaming as part of the time signature: