Add HTTPRoute template to the chart #31
Description
What would you like to be added: Add a Gateway API HTTPRoute to the project, to be used instead of an Ingress.
Why is this needed: Ingress is being replaced. The community is slowly migrating to the more flexible Gateway API. In particular, ingress-nginx has been deprecated so that's pushing me to move towards the gateway API and the stirling-pdf chart doesn't include it's own HTTPRoute.
Note that it should always be optional, as the CRDs don't ship in core kubernetes, requiring them to be installed first.