Put random equipment on summoned armor stands

[qixils]

Give them arms and put random items on them + the armor slots

Use weighted random to determine how many items, then add random enchantments and attributes via a new method on the lootbox command (i.e. move the existing logic into a dedicated method)

• [x] Random armor
• [ ] Random tools/weapons

[qixils]

Not actually quite done yet; still need to add random held items