via point routing mvp

[tkalvas]

Proposed Changes

• via point routing is returned to the extent that otp2 allows it
  • passthrough routing only
  • have to type a station/stop name manually, cannot point and click

Pull Request Check List

• A reasonable set of unit tests is included
• Console does not show new warnings/errors
• Changes are documented or they are self explanatory
• This pull request does not have any merge conflicts
• All existing tests pass in CI build

Review

• Read and verify the code changes
• Test the functionality by running the UI locally with all popular browsers available in your platform
• Check that the implementation matches the design, when such one is defined in a Jira issue
• Merge the pull request

[vesameskanen]

It seems that if a via stop is not used by transit legs, it will not be rendered in itinerary summary:

http://localhost:8080/reitti/Helsingin%20p%C3%A4%C3%A4rautatieasema%2C%20Helsinki%3A%3A60.170747%2C24.941445/Tiet%C3%A4j%C3%A4%2C%20Espoo%3A%3A60.188176%2C24.805213?intermediatePlaces=Tapiola%20%28M%29%2C%20Espoo%2A%2AHSL%3A2000002%3A%3A60.175022%2C24.804236&time=1733928765