fix(world): centralize shadow config and remove warmup

- Extract SHADOW_CONFIG into lightingConfig.ts (bias=0, normalBias=0,
  cameraSize=95) matching the historically working values from develop.
- Drop SceneShadowWarmup; rely on sun.shadow.autoUpdate=true for
  steady-state refresh.
- Enable cloud castShadow and traverse Ebike meshes for cast/receive.

src/utils/debug/Debug.ts

@@ -26,6 +26,7 @@ const DEBUG_FOLDER_ORDER = [
   "Hand Tracking",
   "Map",
   "Personnages",
+  "Debug",
 ] as const;
 
 function isRecord(value: unknown): value is Record<string, unknown> {