Adds backpacks that can be improved, thereby increasing the space in your inventory. It also adds achievements.
Types of backpacks:
1. Classic - has the inventory of a regular chest
2. Copper - has 9 more slots than the classic one
3. Iron - has a double chest inventory
4. Golden - it has 80 slots
5. Diamond - it has 96 slots
6. Netherite - it has the largest inventory expansion of 144 slots.
