Shields Rebalance

Hi! This mod is my attempt to make shields more useful and balanced. I can't achieve everything I want by simply patching the configs, but I hope that these changes will help you feel the desired experience.

List of changes:

• Added copper shield and its variations.
• The chance of absorbing damage with active use is 100%, and with passive use as much as 25%.
• The amount of damage that a shield can absorb in 1 hit has been greatly increased to finally serve as a reliable shield. This value depends on the materials of the shield.
• The durability of all shields has been dramatically reduced to reflect shield behavior more realistically.

Known issues and plans:

• Crafting wooden-copper shields from multi-colored leather is not available, but you can still upholster a wooden-copper shield with regular leather.
• Fix leather shields not taking wood type into account when calculating durability.

I will be waiting for your comments!