Usability: Include all used types in the generated files

[smw-wagnerma]

To get the generated files compileable, I have to include the used types. For me, it was for example:

use xsd_types::types as xs;
use xsd_parser::generator::validator::Validate;
use macro_utils::{UtilsDefaultSerde,UtilsTupleIo};
use std::str::FromStr;

It would be nice to include all used types through the code generator to get the files compileable without modifications.