Changes to Book Appointment V2

added the new optional request property save_payment_method

added the new optional request property location_type

added the new optional request property call_modality

added the new optional request property payment_sheet

added the optional property customer_id to the response with the 201 status

added the optional property ephemeral_key to the response with the 201 status

added the optional property payment_intent_client_secret to the response with the 201 status

added the optional property publishable_key to the response with the 201 status