Piercing Blade Fury for D2RMM

Enables Blade Fury piercing by preventing projectile destruction when collides with something.

Crucially, this preserves vanilla behavior: Blade Fury inherently ignores the Pierce modifier, and since Razortail remains the only equippable but impractical pierce gear for Blade Assassins (other sources being bow/throwing weapons), modifying collision mechanics was prioritized over altering core piercing rules.