Add option to include the import syntax for the resource in a comment above it

e.g 

```
kubectl get po -o yaml | tfk8s --import --strip

# terraform import kubernetes_manifest.configmap_test "apiVersion=v1,kind=ConfigMap,name=test,namespace=default"
resource "kubernetes_manifest" "configmap_test" {
  manifest = {
    "apiVersion" = "v1"
    "data" = {
      "TEST" = "test"
    }
    "kind" = "ConfigMap"
    "metadata" = {
      "name" = "test"
    }
  }
}