change `pod.add_to_schema` to add types instead of instances
Blocked by #73 (closed)
Current flow of add_to_schema is not very user-friendly:
pod_client.add_to_schema(Account("", "", "", "", ...))
pod_client.add_to_schema(Service("", "", ...))
pod_client.add_to_schema(EmailMessage("", "", "", "", ...))
Would be much nicer if it was:
pod_client.add_to_schema(Account, Service, EmailMessage, Person)