Manage resources with CLEO á la `kubectl`.

[vv-ab]

[kKdH]

Hey @vv-ab, i restructured the YAML part and cleaned-up the API. It reduces the code to get a pre-parsed YamlSpecificationFile in CLEO to a single line:

let file = YamlSpecificationFile::try_from_yaml_str(&content)?;

After that, one can iterate over the contained documents and create finally-parsed SpecificationDocuments

file.documents.into_iter()
   .map(SpecificationDocument::try_from)
   .collect();

You should be able to pick up the task and use the that SpecificationDocuments to create resources at CARL.