feat(pagination): add missing parameters

[jonperron]

Changelog:

• Update Arrivals API
• Update Departures API
• Update Stop Schedules API
• Update Route Schedules API
• Update Terminus Schedules API
• Update documentation

Fix #81

[Copilot]

Pull Request Overview

This PR adds pagination parameters to multiple schedule and arrival/departure API methods to enable better control over result sets. The changes add count and start_page parameters to allow callers to specify the maximum number of results and starting page for pagination.

• Adds count parameter (default: 10) to limit the number of results returned
• Adds start_page parameter (default: 0) to specify the starting page for pagination in schedule APIs
• Updates function signatures, documentation, and parameter dictionaries consistently

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
terminus_schedules_apis.py	Adds count and start_page parameters to both list methods
stop_schedules_apis.py	Adds count and start_page parameters to both list methods
route_schedules_apis.py	Adds count and start_page parameters to both list methods
departure_apis.py	Adds only count parameter to both list methods
arrival_apis.py	Adds only count parameter to both list methods

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