Traveler's Backpack

✨ Added resetting backpack if clicked on backpack placed in the world with shift + right-click while holding Blank Upgrade
🔧 Leather is required again in first slot to apply backpack tier upgrades in smithing table
🔧 Sleeping bag tweaks
🔧 Improved ability ticking logic
🔧 allowShulkerBoxes server config option allows backpacks to be put in Shulkerbox inventory too
🐛 Fixed Accessories not rendering backpack from cosmetic slot
🐛 Fixed bundle/shulkerbox saving issue inside backpack container