update docs for datasets

Author: liugangcode

docs/source/dataset.rst

@@ -0,0 +1,22 @@
+Datasets Overview
+====================================================
+
+The ``torch-molecule`` provide easy access to a wide range of datasets (pre-cached or from Hugging Face Hub).
+
+.. rubric:: QM9
+.. autofunction:: torch_molecule.datasets.load_qm9
+
+.. rubric:: ChEMBL2k (a small subset from ChEMBL database)
+.. autofunction:: torch_molecule.datasets.load_chembl2k
+
+.. rubric:: Broad6k
+.. autofunction:: torch_molecule.datasets.load_broad6k
+
+.. rubric:: ToxCast (The US EPA Toxicity Forecaster program)
+.. autofunction:: torch_molecule.datasets.load_toxcast
+
+.. rubric:: ADMET (absorption-distribution-metabolism-excretion-toxicity)
+.. autofunction:: torch_molecule.datasets.load_admet
+
+.. rubric:: Gas Permeability for polymers
+.. autofunction:: torch_molecule.datasets.load_gasperm

docs/source/index.rst

@@ -19,6 +19,7 @@ It offers a user-friendly interface similar to `sklearn`, and includes model che
 
    install
    example
+   dataset
    overview
 
 .. toctree::