/*!
Creates an appender object.
Note that the object must be destroyed with `duckdb_appender_destroy`.
* @param connection The connection context to create the appender in.
* @param catalog The catalog of the table to append to, or `nullptr` for the default catalog.
* @param schema The schema of the table to append to, or `nullptr` for the default schema.
* @param table The table name to append to.
* @param out_appender The resulting appender object.
* @return `DuckDBSuccess` on success or `DuckDBError` on failure.
*/
DUCKDB_API duckdb_state duckdb_appender_create_ext(duckdb_connection connection, const char *catalog,
                                                   const char *schema, const char *table,
                                                   duckdb_appender *out_appender);