rendering: fix NPC movement animation IDs and remove redundant player anim

The renderer's CharAnimState machine already drives player character
animations (Run=5, Walk=4, Jump, Swim, etc.) — remove the conflicting
camera controller code added in the previous commit.

Fix creature movement animations to use the correct WoW M2 IDs:
4=Walk, 5=Run. Both the per-frame sync loop and the SMSG_MONSTER_MOVE
spline callback now use Run (5) for NPC movement.

include/rendering/camera_controller.hpp

@@ -226,9 +226,6 @@ private:
     bool autoRunning = false;
     bool tildeWasDown = false;
 
-    // Movement animation state tracking
-    bool prevPlayerMoving_ = false;
-
     // Movement state tracking (for sending opcodes on state change)
     bool wasMovingForward = false;
     bool wasMovingBackward = false;