fix(vagrant): hip-anchors body-relative; leg-orientation procedural

User feedback: 'anchorpoints sind hüftgelenke und können sich nicht
frei drehen. hüfte bleibt zum körper statisch'.

Architecture:
- legs.parent = body (was lower_control). Hip position cascades from
  body.world.rot, so hips stay at body-frame left/right regardless of
  body rotation. lower_control virtual bone removed (no longer needed).
- Procedural 'leg_orientation' sets leg.local.rot = walk_dir - body.rot
  each frame, so leg.world.rot = walk_dir (independent of body cascade).
  Requires puppet v0.4.2 per-channel write_bone (walk_anim writes leg.scl
  while procedural writes leg.rot — disjoint channels).

Result: legs visually attach at body's anatomical left/right hips no
matter where body faces; stride oscillation aligns with WASD walk
direction. Hip position no longer drifts with walk direction.

manifest.module

@@ -15,7 +15,7 @@
         {"id": "lib-core.camera",                 "version": "0.3.0"},
         {"id": "lib-core.render",                 "version": "0.1.0"},
         {"id": "lib-core.maps",                   "version": "0.1.2"},
-        {"id": "lib-core.puppet", "version": "0.4.1"},
+        {"id": "lib-core.puppet", "version": "0.4.2"},
         {"id": "lib-asset.prototype-subterrain",  "version": "0.1.1"}
     ]
 }