Multiple main tracks for map difficulty

[lodyb]

Is your feature request related to a problem?

There are a bunch of surf maps (and maybe other style maps) where the difficulty can be selected.

I don't think there is the ability in the current specification to have multiple main tracks.

Describe the solution you'd like

Multiple main tracks? e.g. Easy, Pro track

Describe alternatives you've considered, if any.

We would have to make multiple BSPs for each difficulty if this is not implemented

I think it would need to be defined how the multiple tracks would be handled, probably multiple BSP or making the alternative routes bonuses or something

Additional context

multitracks.mp4