updates to 3p setup following merge from main
Removed the SprintController from the entity - with the hold type gone its guard never passes,
sprint pose stayed at 1 on the right arm and hid everything the anim
subsystem was doing. Added an Aiming bool plus IdleAim/AttackAim on the 3p_nailgun_aim clips
that were sitting unused in the FBX, one handed to match the rest of the weapon, and pointed
the subsystem's AimingParameter at it.