[APPS-524] Add support for new ticket location

This adds support for the new ticket location. It also loads customer and orders dynamically, updating the respective sections on the template. Unfortunately Shopify doesn't have an API that we can query using the order nice ID, so we need a requester e-mail that matches a Shopify customer's e-mail to be able to display the ticket order.

JIRA: https://zendesk.atlassian.net/browse/APPS-524

/cc @jwswj @s-vizzari @maximeprades @tmcinerney