Sable: True Impact (For Create: Aeronautics)

Fixes

• Fixed world block impact energy being computed from a structure's full velocity magnitude instead of just the velocity component along the actual contact normal. A structure accelerating tangentially under its own power (engine thrust, wheeled movement along the ground) was getting charged as if it collided with the ground on every tick, tearing up terrain it never actually hit. Only genuine impacts along the surface normal register now.