CHANGE LOG 1 - 9/26/25

• Add Rock Spawn types
  • Spawn them based on coordinates; the further out from the center, the more rare
• Added tin ore: found by mining
• Added tin bars; nothing uses them, but they will soon
• Added carbon: coal+coal
• Added steel: carbon+iron bar
• Added bronze: Tin bar + Copper bar: like tin, no real use yet
• Added a rock scanner: buildable, scan rocks for new rock types