Which problem is this feature request solving?

https://duckdb.org/docs/sql/data_types/overview.html#nested--composite-types

Describe the solution you'd like

• Arrow maps should be mapped to/from DuckDB maps
• Arrow structs should be mapped to/from DuckDB structs

Pull request (optional)

• I can submit a pull request