Replace ceiling Y offset with per-pose CharacterController capsule

Each PlayerPose now carries its own collider center Y, radius and height,
eased and routed to the CharacterController via a SetCapsule single-writer.
This lets crawl poses (Ball/Star) shrink the capsule to fit under furniture.
The ceiling Y offset is removed; poses without authored sizes fall back to
the base capsule, so existing poses keep their collision.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Assets/Scenes/SampleScene.unity

@@ -4633,7 +4633,7 @@ MonoBehaviour:
   wallOffsetReturnSpeed: 2
   wallOffsetFollow: 12
   wallExitGrace: 0.15
-  ceilingGrabDistance: 0.3
+  ceilingGrabDistance: 0.02
   wallTopOutBoost: 0.3
   cameraOrbit: {fileID: 0}
   meshOffsetTarget: {fileID: 0}
@@ -4660,7 +4660,8 @@ MonoBehaviour:
   defaultPoseIndex: 0
   cycleKey: 17
   poseBlendDuration: 0.2
-  ceilingOffsetSpeed: 4
+  cameraOffsetSpeed: 4
+  capsuleBlendSpeed: 8
   applyFootIK: 0
 --- !u!114 &1141039644
 MonoBehaviour: