Ninja Weapons

• Added new weapon Bokken

Bokken is a weapon with 4 attack power, 1.6 attack speed and max durability 256.

Bokken is an alternative to Wooden Sword, but with Better Combat installed it becomes a Katana motion, which is a clear differentiator.

• Added new weapon Shikoro

Shikoro is a weapon with 5 attack power, 2.4 attack speed and max durability 512.

Equivalent mining performance to Iron Axe.

Shikoro is a sickle motion when Better Combat is installed.