feat(srr): transit routing by transport mode utilities

[sebhoerl]

This is a relatively simple PR that adds a new option to RaptorParameters called useTransportModeUtilities. If it is set to true (default is false), SwsissRailRaptor will calculate the utility of a leg while routing based on the transportMode that is defined in the schedule for the respective TransitRoute, rather than using the generic pt.

Such a behavior could already be achieved by defining "mode mappings", but this forces the user to introduce many individual leg modes, which means that one needs to deal with them in analysis. Plus, the mode mapping approach doesn't allow distinguishing between scoring generic transit trip vs. deciding which path to take while routing (which is not the same).

Another alternative would be to use RaptorInVehicleCostCalculator, but the interface, currently, does not pass the TransitRoute or anything else into getInVehicleCost that would allow returning a transportMode dependent cost. We could discuss extending the interface instead of the present PR, but I think it would have additional implications for other places such as the OccupancyTracker, etc.

See the new unit test for an example.

[sebhoerl]

@jfbischoff Any opinion on that, or maybe even a better solution somewhere lying around? :)

[jfbischoff]

Hi, sorry for the lenghtly response, I was sitting at the beach 🏖️
I think this is very reasonable, thanks for the idea.