Implement read-only Dynu Terraform provider skeleton

examples/data-sources/dynu_dns_records/data-source.tf

@@ -0,0 +1,7 @@
+data "dynu_dns_records" "records" {
+  hostname = "www.example.com"
+}
+
+output "records" {
+  value = data.dynu_dns_records.records.records
+}