Refactor camera management and implement player bed interaction
- Move camera ownership from Render to Scene and implement Scene::getCamPosRot.
- Implement Player::goToBed with 3rd person mesh and animation support.
- Add sleeping camera to Bed and trigger player sleep interaction.
- Add Alara 3rd person mesh and GoToBed animation assets.
- Add RespawnAreaDoor programmatically in RespawnArea.
- Add SPACE key shortcut to SceneEditor for logging camera position.
- Update Assets::getList to filter for cube assets and remove light types.