Increases the amount of slots in all backpacks, tries to make each backpack upgrade feel like an upgrade. Also changes backpacks to require more recources/iron for balance

• Hand Basket- Now has 4 slots instead of 3.
• Hunter Backpack- Now has 6 slots Instead of 4.
• Linen Sack- Now has 8 slots instead of 5.
• Backpack- Now has 12 slots instead of 6.
• Mining Bag- Now has a whopping 18 slots instead of 10.
• Increases the backpack cost to fit more appropriately in this re-balance by changing the recipe to:

(was just 8 leather, now its 16 leather and is gated behind the iron age.)

!!NOTE: BACKPACKS THAT ALREADY ARE CREATED WILL NOT UPDATE TO REFLECT THEIR NEW STORAGE CAPACITY, YOU WILL NEED TO DELETE AND REMAKE/SPAWN IN REPLACEMENTS ON EXISTING SAVE FILES. NOTE THAT THE REVERSE IS TRUE WHEN TRYING TO REMOVE THE MOD FROM A WORLD!! (The nice thing about this is your backpacks should keep their size even without the mod/ and after updates.)