Add item template

[benwebber]

Fields:

• Category
  • Armour
  • Potion
  • Ring
  • Rod
  • Scroll
  • Staff
  • Wand
  • Weapon
  • Wondrous item
• Type
  This should probably be free-form like creature alignments.
• Rarity
  • Common
  • Uncommon
  • Rare
  • Very rare
  • Legendary
• Requires attunement
  This is sometimes qualified: "requires attunement by a spellcaster" or "by a creature of non-lawful alignment".