Improve dataset card: Add task categories, paper, code, project page, and sample usage

This pull request enhances the dataset card for SAGE-3D Collision Mesh by:
- Adding `task_categories: ['robotics', 'image-to-3d']` to the YAML metadata for better discoverability.
- Including direct links to the associated paper ([Towards Physically Executable 3D Gaussian for Embodied Navigation](https://huggingface.co/papers/2510.21307)), project page ([https://sage-3d.github.io](https://sage-3d.github.io)), and GitHub repository ([https://github.com/Galery23/SAGE-3D_Official](https://github.com/Galery23/SAGE-3D_Official)) at the top of the README.
- Introducing a "Sample Usage" section, demonstrating how to clone this dataset and integrate its collision meshes into USDA scene files using the `sage3d_usda_builder.py` script from the official GitHub repository, including necessary context for Isaac Sim.

These changes provide more complete information for users and integrate the dataset more effectively within the Hugging Face ecosystem.

README.md

@@ -1,8 +1,14 @@
 ---
 license: cc-by-nc-4.0
+task_categories:
+- robotics
+- image-to-3d
 ---
+
 # SAGE-3D Collision Mesh: Physics-Enabled Collision Bodies for 3D Gaussian Scenes
 
+[Paper](https://huggingface.co/papers/2510.21307) | [Project Page](https://sage-3d.github.io) | [Code](https://github.com/Galery23/SAGE-3D_Official)
+
 High-precision collision geometry dataset extracted from 1,000 indoor Mesh scenes, enabling physically accurate navigation and interaction in virtual environments.
 
 <div align="center">
@@ -60,11 +66,53 @@ Collision_Mesh/
 └── ...
 ```
 
+---
 
+## 💡 Sample Usage
 
----
+This dataset provides physics-enabled collision bodies in USD format, which are crucial for enabling physically accurate navigation and interaction in virtual environments. These meshes are primarily used to integrate with 3D Gaussian Splatting (3DGS) scenes (e.g., from [spatialverse/SAGE-3D_InteriorGS_usdz](https://huggingface.co/datasets/spatialverse/SAGE-3D_InteriorGS_usdz)) to create complete USDA scene files compatible with physics simulation platforms like NVIDIA Isaac Sim.
+
+### 1. Download the SAGE-3D Collision Mesh Dataset
+
+First, clone this dataset repository using `git lfs`:
+
+```bash
+git lfs install
+git clone https://huggingface.co/datasets/spatialverse/SAGE-3D_Collision_Mesh
+```
 
+### 2. Prepare Isaac Sim Environment
 
+The full SAGE-3D project, including the use of these collision meshes, relies on NVIDIA Isaac Sim. Please refer to the [official SAGE-3D GitHub repository](https://github.com/Galery23/SAGE-3D_Official#isaac-sim-setup) for detailed instructions on setting up Isaac Sim (version 5.0+).
+
+### 3. Build USDA Scene Files with Collision Data
+
+Once you have downloaded this collision mesh dataset and obtained the USDZ scene files (e.g., from [spatialverse/SAGE-3D_InteriorGS_usdz](https://huggingface.co/datasets/spatialverse/SAGE-3D_InteriorGS_usdz)), you can integrate the collision bodies into USDA scene files using the `sage3d_usda_builder.py` script provided in the [SAGE-3D Official repository](https://github.com/Galery23/SAGE-3D_Official).
+
+```bash
+# Example command to build USDA Scene Files
+python Code/benchmark/scene_data/sage3d_usda_builder.py \
+    --usdz-dir /path/to/usdz \
+    --out-dir /path/to/output/usda \
+    --template Data/template.usda \
+    --usdz-placeholder "@usdz_root[gauss.usda]@" \
+    --collision-placeholder "@collision_root@" \
+    --usdz-path-template "/path/to/usdz/{scene_id}.usdz[gauss.usda]" \
+    --collision-path-template "/path/to/Collision_Mesh/{scene_id}/{scene_id}_collision.usd" \
+    --overwrite
+```
+
+**Parameters:**
+- `--usdz-dir`: Directory containing USDZ scene files (e.g., from [spatialverse/SAGE-3D_InteriorGS_usdz](https://huggingface.co/datasets/spatialverse/SAGE-3D_InteriorGS_usdz))
+- `--out-dir`: Output directory for USDA files
+- `--template`: Path to USDA template file (found in the [SAGE-3D_Official GitHub repository](https://github.com/Galery23/SAGE-3D_Official))
+- `--usdz-placeholder`: Placeholder string in template for USDZ reference (default: `@usdz_root[gauss.usda]@`)
+- `--collision-placeholder`: Placeholder string in template for collision payload (default: `@collision_root@`)
+- `--usdz-path-template`: Template for USDZ reference path (use `{scene_id}` as placeholder)
+- `--collision-path-template`: Template for collision payload path (use `{scene_id}` as placeholder to point to files in this dataset)
+- `--overwrite`: Overwrite existing USDA files
+
+---
 
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