Add docling to Data Analysis

Author: Aditya

README.md

@@ -330,6 +330,8 @@ _Libraries for data analysis._
 - [pandas](http://pandas.pydata.org/) - A library providing high-performance, easy-to-use data structures and data analysis tools.
 - [pathway](https://github.com/pathwaycom/pathway) - Real-time data processing framework for Python with reactive dataflows.
 - [polars](https://github.com/pola-rs/polars) - A fast DataFrame library implemented in Rust with a Python API.
+- [docling](https://github.com/docling-project/docling) - Library for converting documents into structured data.
+
 
 ## Data Validation