Resolve VSN-1870 "Feature/add endpoint to append passenger to a trip and auto-regenerate it"
- Added new endpoint to add a passenger point to an existing trip and trigger automatic regeneration of that trip with the new passenger
- Refactor GenerateTripsServiceImpl with processTripGeneration and regenerateTripWithNewPassenger methods
- Updated AmendmentToTripAlgoMapper to build PassengerTripDTO from AddPointRequest Closes VSN-1870