This PR introduces a builder pattern to create the GTFSConverter instance and deprecates the old constructor.
The builder allows specifying predicates to filter routes, which enables working with large gtfs files, where not all trips are needed in the final scenario
This PR introduces a builder pattern to create the GTFSConverter instance and deprecates the old constructor. The builder allows specifying predicates to filter routes, which enables working with large gtfs files, where not all trips are needed in the final scenario