Suggest adding support for DuckDB to Drogon.

DuckDB（https://github.com/duckdb/duckdb） is an efficient embedded relational database for OLAP, excelling in columnar storage and complex queries. Integrating it with the Drogon framework can enhance data analysis capabilities for web applications, ideal for scenarios requiring real-time data processing or analytics.
So，integrating DuckDB empowers Drogon with efficient data processing capabilities and broader application scenarios while maintaining the framework’s high performance and modern characteristics.