input: Write a python function to initialize the world with rooms, items, and quests.
  assert 'forest' in initialize_world()[0].keys()
  assert 'sword' in initialize_world()[1]
  assert 'find_treasure' in initialize_world()[2]
output: def initialize_world():
      rooms = {
          'forest': 'A dense forest with towering trees.',
          'castle': 'An ancient castle with many hidden secrets.',
          'village': 'A small village with friendly inhabitants.'
      }
  
      items = [
          'sword',
          'shield',
          'potion'
      ]
  
      quests = [
          'find_treasure',
          'rescue_princess',
          'slay_dragon'
      ]
  
      return rooms, items, quests