Fill datasets section

Author: bstaber

docs/datasets.md

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-At the heart of PLAID is the seemless exchange of dataset for streamlined collaboration. Corresponding datasets are provided in [HuggingFace](https://huggingface.co/PLAID-datasets) as well, and in a [Zenodo community](https://zenodo.org/communities/plaid_datasets).
+# PLAID Datasets Overview
+
+
+At the heart of PLAID is the seemless exchange of dataset for streamlined collaboration. Corresponding datasets are provided at [HuggingFace](https://huggingface.co/PLAID-datasets) and in a [Zenodo community](https://zenodo.org/communities/plaid_datasets).
+
+[PLAID‑datasets](https://huggingface.co/PLAID-datasets) is a curated collection of physics‑based datasets formatted with the **PLAID** data model.  Each dataset represents a computational physics or structural mechanics problem defined on unstructured meshes and is suitable for **graph machine‑learning** applications.  The datasets contain mesh data together with scalar and field quantities (e.g., pressure, displacement and turbulence variables) and come with predefined train/test splits to support machine‑learning tasks.  They were all generated using the PLAID library and datamodel and are released under open licences.
+
+## Datasets summary
+
+| Dataset | Size* | Domain | Link |
+|---|---|---|---|
+| **AirfRANS_remeshed** | 1000  | 2D CFD (airfoil) | [HF](https://huggingface.co/datasets/PLAID-datasets/AirfRANS_remeshed) |
+| **AirfRANS_original** | 1000  | 2D CFD (airfoil) | [HF](https://huggingface.co/datasets/PLAID-datasets/AirfRANS_original) |
+| **AirfRANS_clipped** | 1000  | 2D CFD (airfoil) | [HF](https://huggingface.co/datasets/PLAID-datasets/AirfRANS_clipped) |
+| **VKI‑LS59** | 839  | 2D internal aero (compressor blade) | [HF](https://huggingface.co/datasets/PLAID-datasets/VKI-LS59) |
+| **Tensile2d** | 702  | 2D structural (quasistatic) | [HF](https://huggingface.co/datasets/PLAID-datasets/Tensile2d) |
+| **Rotor37** | 1200  | 3D CFD (compressor blade) | [HF](https://huggingface.co/datasets/PLAID-datasets/Rotor37) |
+| **2D_Multiscale_Hyperelasticity** | 1140  | 2D structural (hyperelasticity) | [HF](https://huggingface.co/datasets/PLAID-datasets/2D_Multiscale_Hyperelasticity) |
+| **2D_profile** | 400  | 2D external aero | [HF](https://huggingface.co/datasets/PLAID-datasets/2D_profile) |
+| **2D_ElastoPlastoDynamics** | 1018 | 2D structural (dynamic) | [HF](https://huggingface.co/datasets/PLAID-datasets/2D_ElastoPlastoDynamics) |
+
+\*Includes all available splits.