Feature Request: Render-only asset instance helper for visual scenes

Feature Request: Render-only asset instance helper for visual scenes: a task in LegoFlow-SWE (Harbor dataset). Problem: Habitat-Sim currently lacks a minimal, efficient interface for adding and controlling a large number of render-only visual assets in a scene without creating physics objects…

The task

**Problem:** Habitat-Sim currently lacks a minimal, efficient interface for adding and controlling a large number of render-only visual assets in a scene without creating physics objects. Users who want to populate a purely visual scene (e.g., for data generation, layout experiments, or static decorations) must…

Part of Lego-X/LegoFlow-SWE.