support duckdb?

[pdenapo]

It would be nice that bun supports duckdb.

Though duckdb is mostly compatible with posrgresql (and in the tests that I have done Bun seems to work with the postgresql dialect),
there are some minor differences documented here:

https://duckdb.org/docs/stable/sql/dialect/postgresql_compatibility

I don't know if a different specific dialect would be needed.
Any test suite that we could use for checking that?