Determine format for world storage

[mattfbacon]

• [ ] Create abstraction (trait) for a world storage method
• [ ] Figure out what format to use
• [ ] Implement the previously created trait for that format

[mattfbacon]

Remember, the world needs to store at least the following:

• General level data
  • Gamemode
  • Time of day
  • World type and seed (for terrain generation)
  • etc
• Block data
• Entity positions
• Entity NBT data (not necessarily inline; could be stored somewhere else and referred to by UUID)
• Player data
  • Inventories
  • Health, hunger, saturation
  • Current dimension (this would be stored in the global player data rather than the dimension group–specific data)