Feature/WPP-9748 - Add Extension-England-AppointmentConfirmationRequired to API Specs

[simeonparris-nhs]

Summary

• ✨ New Feature

This pull request add the Appointment resource extension called Extension-England-AppointmentConfirmationRequired to the consumer and producer API specifications. This is being done to support the new "Confirm Attendance" feature in the NHS App.

JIRA Ticket: WPP-9748

NOTE: Initially raising as a DRAFT PR until this feature has been fully signed off by Clinical

Reviews Required

• Dev
• Test
• Tech Author
• Product Owner

Review Checklist

ℹ️ This section is to be filled in by the reviewer.

• I have reviewed the changes in this PR and they fill all or part of the acceptance criteria of the ticket, and the code is in a mergeable state.
• If there were infrastructure, operational, or build changes, I have made sure there is sufficient evidence that the changes will work.
• I have ensured the changelog has been updated by the submitter, if necessary.

[github-actions]

This branch is work on a ticket in the NHS Digital APM JIRA Project. Here's a handy link to the ticket:

APM-000