Content: Steam Audio export rename + wall transmission tuning

- The Room export split/renamed to 'The Room Scene.asset' / 'The Room Audio.asset' under Assets/Scenes (old root-level export removed), scene references updated
- Default Steam Audio material: transmission raised (0.8/0.6/0.3) so walls dampen less aggressively
- EditorSettings: enter-play-mode options reset

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

ProjectSettings/EditorSettings.asset

@@ -25,7 +25,7 @@ EditorSettings:
   m_AsyncShaderCompilation: 1
   m_PrefabModeAllowAutoSave: 1
   m_EnterPlayModeOptionsEnabled: 1
-  m_EnterPlayModeOptions: 3
+  m_EnterPlayModeOptions: 0
   m_GameObjectNamingDigits: 1
   m_GameObjectNamingScheme: 0
   m_AssetNamingUsesSpace: 1