Enhancement of the crossbow

Added two types of Enchanting to crossbows:

  1.<sniper> max level: three

Each level of <Sniper> adds 1 extra damage and 5% bullet rate of fire.

  2.<multiple filling>max level: one

Each additional level can make the crossbow refill an additional round of ammunition， <sniper> and <multiple filling> are mutually exclusive.

  3.<Land Sea Contract>max level: one

Crossbows can be loaded with tridents, and can enjoy the enchantment of both at the same time.