CarParks not fully supported

[andtry]

CarParks is missing in the graphQL API.

It seems to work using carParks for accessMode in trips -requests, so this should only be a extension to the exposed graphQL queries

[gmellemstrand]

We are missing CarPark information from the OTP model. We have a ParkAndRideVertex, the same way as BikeParkVertex and BikeRentalStationVertex, but we are missing an object with additional information about the CarPark. Then we could update available spaces with realtime data.

This information is also something we would want to populate from NeTEx data at Entur, instead of OSM data. So this should be configurable.

Adding this would probably also involve cleaning up the BikePark and BikeRentalStation classes, as these are used both in the internal model and the REST API.

[github-actions]

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