Support TIME_NS data type (new in 1.4.0)

[jraymakers]

This includes, in the bindings:

• The new DUCKDB_TYPE enum value TIME_NS.
• The new DuckDB C API type duckdb_time_ns
• The two new DuckDB C API functions duckdb_create_time_ns and duckdb_get_time_ns.

In the API, the following will be needed:

• A new DuckDBTypeId enum value .
• A new DuckDBType class.
• A new DuckDBValue class.
• A new DuckDBVector subclass.
• A new case in createValue.
• A new case in typeForValue.
• New entries in the value converters.

[jraymakers]

Mostly implemented in #329 and #330, though a DuckDB fix will be needed for this new type to work end-to-end.

[jraymakers]

Released in 1.4.1-r.5, but not working end-to-end yet. See duckdb/duckdb#19613