BackPackPack Plus FG

I will, naturally, remove this updated version upon request from the original author.

Updated to 1.20.1, supporting the new Sturdy variants of the backpack and mining bag.

With increased storage sizes for all your stuff.

Recipe for Temporal storage now REQUIRES the steel pack, so no skipping progression!

All art and assets credit goes to the original author, I just got all the JSON stuff working.

Backpack capacities:

• Vanilla Backpack changed to 12 (Vanilla: 6)
• Vanilla Sturdy Backpack changed to 16 (Vanilla: 8)
• Vanilla Basket changed to 8 (Vanilla: 3)
• Vanilla Hunter Backpack to 12 (Vanilla: 4)
• Vanilla Quiver to 16 (Vanilla: 10)
• Vanilla Mining Bag to 18 (Vanilla: 12)
• Vanilla Sturdy Mining Bag to 24 (Vanilla: 14)
• Vanilla Linen Sack to 12 (Vanilla: 5)
• New Grass Basket is 8
• New Bronze Backpack is 20
• New Iron Backpack is 24
• New Steel Backpack is 32
• New Temporal Backpack is 48