Add post-processing capabilities or other rules that users can set when creating workouts

For example:

1. engaging motivational and or educational instructions to workouts

2. break up longer workout blocks into smaller ones. For example, if there’s a 20 minute threshold block, I’d like to break it up into four 5-minute blocks. I’m not trying to add rest between them, it’s just that Zwift awards XP based on the full completion of a block. So if I’m short on time and I do 15 minutes of a 20 minute block but then have to skip the rest of it, I get zero XP.