I searched the document and didn't see any mention of luck or bonus rolls for loot.

If such a feature exists, how does it work?
If not, would it be possible to add a bonus_rolls tag?
I imagine this would work similarly to vanilla loot table tags, and to the incontrol fortune enchant tag.

Example. I have an item added to a loot table with a random tag of 0.5
Then, a bonus_roll tag of 0/1/2
The first number is number of bonus rolls with luck 0
Second number is number of bonus rolls with luck 1
Third number is number of bonus rolls with luck 2 and beyond

This would allow pack devs to make the luck enchant much more useful by allowing additional rolls against a random roll loot drop.