Shouldn't DuckDBDatabaseMetaData#getTables also returns views in the database

[siggemannen]

As title, right now only tables seems to be returned, even though supported table types are tables + views.
Other jdbc providers return both.
I can probably create a PR, but the changes will break backward compatibility.

Same issue probably exists when fetching columns, it should probably use duckdb_columns().

[staticlibs]

Hi, thanks for the report! I cannot answer this quickly. If there are supporting info, that views inclusion is reasonable - then the PR implementing that will be appreciated!

If we are in situations when "other DBs doing that" (especially Postgres), than backwards compatibility will be less important.