NPC-to-Item-Piles should roll random items as well

[oakbrad]

Monsters should drop random items automatically, rolled from tables of Items, using similar logic to the existing rollCoins function.

Hypothetical drop

• 95% chance of 1 roll on Shady Supplies
• 80% chance of 1d4 rolls on Adventuring Supplies
• 20% chance of 1d2 rolls on Potion Table
• 5% chance of 1 roll on Magic Item table

References

• Foundry API
• ItemPiles docs