[Pre-Alpha] Active Ragdoll Engine

A physics-based active ragdoll engine that lets characters stay animated while still reacting naturally to the world around them. It includes cowering, falling, death, and impact animations, with the ragdoll trying to follow each pose instead of instantly going completely limp. Characters can collapse, hit the ground, and move differently depending on what is happening, making every fall and death feel less repetitive and more realistic. The system also supports manual ragdolling, automatic fall detection, impact sounds, and smooth recovery when the character stops moving.