I recall someone doing this for 2.1. Or maybe it was stock. Can't remember the details.
It would be messy for DSL 2.2 because most IRL builders use unofficial (at the moment) mods, while standard builders stick to stock DSL.
However, 2.3 will make some of those mods official so in theory, you could have every AI pack at once.
The bigger problem is that when individual AI packs are updated, it would be a huge pain to update them in the everything-pack.