Doc issue? What is the proper way of using JDBC PreparedStatement with STRUCT and/or MAP?

I have looked into the code and the DuckDBConnection class has methods like createMap() and createStruct(). The DuckDBPreparedStatement.setObject() does not reveal anything either.

This is what I ended up with for Map:

```
CREATE TABLE "commit" ("commit_id" VARCHAR, "producer_name" VARCHAR, "topic_name" VARCHAR,
"commit_epoch_ns" BIGINT, "record_count" INTEGER, "max_offsets" MAP(VARCHAR, BIGINT));

insertstmt.setObject(fieldpos, conn.createMap("MAP(VARCHAR,BIGINT)", new HashMap<>()));
```

Would be good to add examples to the JDBC client documentation.