feat(journeys): add support for some Valhalla parameters

[jonperron]

Changelog

• Add park_mode and is_journey_schedules parameters
• Add some Valhalla parameters:
  • bike_use_hills
  • walking_use_hills
  • bike_avoid_bad_surfaces
  • walking_step_penalty
  • bike_maneuver_penalty
  • bike_use_living_streets

Fix #83

[Copilot]

Pull Request Overview

This PR adds support for additional journey search parameters in the Navitia API client, including parking modes and Valhalla routing preferences. The changes enable users to customize journey calculations with car parking options and fine-tune biking/walking route preferences.

Key changes:

• Added ParkMode enum with three values: NONE, ON_STREET, and PARK_AND_RIDE
• Added 8 new optional parameters to journey methods: park_mode, is_journey_schedules, and 6 Valhalla routing preference parameters
• Updated documentation to reflect the new parameters

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
navitia_client/entities/journey.py	Defines new ParkMode enum for car parking options
navitia_client/entities/init.py	Exports ParkMode for external use
navitia_client/client/apis/journeys_apis.py	Adds new parameters to all three journey API methods with corresponding filter logic
docs/api_support/journeys.md	Updates method signatures to include new parameters

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