Add AGE, STATUS and READY fields

close #42 (closed)

Add AGE READY STATUS fields

Local test:

ubuntu@bastion:~/sylva-core$ kubectl get sylvaworkloadclusters.workloadclusteroperator.sylva  -A
NAMESPACE   NAME   AGE   READY   STATUS
teama       wc1    19h   False   the sylvaworkloadcluster is not yet ready