added docs

Author: KshitizLohia

ads/feature_store/docs/source/index.rst

@@ -2,23 +2,60 @@
 Welcome to oci-feature-store's documentation!
 =============================================
 
+Feature Store
+=============
+
+|PyPI|_ |PysparkConda|_ |Notebook Examples|_ |Delta|_ |PySpark|_
+
+.. |PyPI| image:: https://img.shields.io/badge/python-3.8-blue?style=for-the-badge&logo=pypi&logoColor=white
+..  _PyPI: https://pypi.org/project/oracle-ads/
+.. |PysparkConda| image:: https://img.shields.io/badge/fspyspark32_p38_cpu_v1-1.0-blue?style=for-the-badge&logo=pypi&logoColor=white
+..  _PysparkConda: https://docs.oracle.com/en-us/iaas/data-science/using/conda-pyspark-fam.htm
+.. |Notebook Examples| image:: https://img.shields.io/badge/docs-notebook--examples-blue?style=for-the-badge&logo=pypi&logoColor=white
+..  _Notebook Examples: https://github.com/oracle-samples/oci-data-science-ai-samples/tree/master/notebook_examples
+.. |Delta| image:: https://img.shields.io/badge/delta-2.0.1-blue?style=for-the-badge&logo=pypi&logoColor=white
+..  _Delta: https://delta.io/
+.. |PySpark| image:: https://img.shields.io/badge/pyspark-3.2.1-blue?style=for-the-badge&logo=pypi&logoColor=white
+..  _PySpark: https://spark.apache.org/docs/3.2.1/api/python/index.html
+
 .. toctree::
-    :maxdepth: 3
-    :caption: Contents:
+    :maxdepth: 2
+    :caption: Getting started:
 
     overview
     terraform
     quickstart
+
+.. toctree::
+    :maxdepth: 2
+    :caption: Feature store entities:
+
     feature_store
     entity
     transformation
     feature_group
     feature_group_job
     dataset
     dataset_job
+
+.. toctree::
+    :maxdepth: 2
+    :caption: Feature store concepts:
+
     statistics
     feature_validation
     ui
+
+.. toctree::
+    :maxdepth: 2
+    :caption: Demo and examples:
+
     demo
     notebook
+
+
+.. toctree::
+    :maxdepth: 2
+    :caption: Release notes:
+
     release_notes