Summary

This change exposes GTFS station entrances via the GraphQL API. It provides a new top-level entrances query which returns all station entrances as well as a new entrances subquery of the stations query which returns all entrances associated with a station.

Top-level query

entrances() {
  gtfsId
  lat
  lon
  name
  vehicleMode
  locationType
}

stations subquery

stations {
  gtfsId
  lat
  lon
  name
  stops {
    ...
  }
  entrances {
    gtfsId
    lat
    lon
    name
    vehicleMode
    locationType
  }
}

Issue

This is a proposed change as part of issue #6081. Further discussion of the implementation and API are still pending as part of this issue, but this PR hopefully will provide additional context. It is possible this PR will evolve significantly with this issue - if it makes more sense to make it a draft, I can do so.

Unit tests

• Unit tests were added for associating Entrance objects with their parent station
• GraphQL integration tests were added for the new queries.

Documentation

• Documentation for new GraphQL queries has been added.