add duckdb support

[tx991020]

DuckDB also follows the PostgreSQL protocol, but like SQLite, it is an embedded database and is considered the best-performing standalone database.

[zhuxiujia]

DuckDB also follows the PostgreSQL protocol, but like SQLite, it is an embedded database and is considered the best-performing standalone database.

Can you use the Postgres driver to connect to DuckDB？

[brucel11qwe]

Currently, Rbatis cannot be used to connect with DuckDB. panic
https://github.com/duckdb/duckdb-rs

[zhuxiujia]

Currently, Rbatis cannot be used to connect with DuckDB. panic https://github.com/duckdb/duckdb-rs

you can impl 6 of rbdc trait , just like mssql to support Duckdb based on https://github.com/duckdb/duckdb-rs

[zhuxiujia]

I can only write a bit of Rust; I'm not very familiar with it.

You can give it a try, it's not difficult