feat: add pandas topic.

topics/pandas/index.md

@@ -0,0 +1,13 @@
+---
+aliases: python-pandas, pandas-library, pandas-dataframe
+created_by: Wes McKinney
+display_name: pandas
+short_description: Pandas is a Python library for data analysis and manipulation with powerful data structures.
+topic: pandas
+logo: pandas.png
+github_url: https://github.com/pandas-dev/pandas
+wikipedia_url: https://en.wikipedia.org/wiki/Pandas_(software)
+related: python, data-science, numpy, machine-learning
+---
+
+Pandas is an open source Python library for fast and flexible data analysis and manipulation. It provides powerful data structures such as Series and DataFrame that make it easy to clean, transform, analyze, and work with structured data. Widely used in data science, machine learning, and analytics, Pandas simplifies tasks like filtering, grouping, merging datasets, and handling missing values while integrating seamlessly with the Python ecosystem.