initial implementation: terraform-provider-encapi

Terraform/OpenTofu provider for encapi (the Puppet ENC replacing Cobbler).
- resources: encapi_role (jsonencode default_params), encapi_status, encapi_node
- data sources: encapi_node, encapi_role
- client with bearer-token auth; unit tests; examples
- Makefile (package->zip), Woodpecker CI publishing to the artifactapi
  terraform-unkin registry on tag

examples/data-sources/encapi_node/main.tf

@@ -0,0 +1,11 @@
+data "encapi_node" "web0" {
+  certname = "ausyd1nxvm2000.main.unkin.net"
+}
+
+output "web0_role" {
+  value = data.encapi_node.web0.role
+}
+
+output "web0_environment" {
+  value = data.encapi_node.web0.environment
+}