feature/step7-informer

[vanelin]

Deployment Informer with client-go

• Added a Go function to start a shared informer for Deployments in the default namespace using k8s.io/client-go.
• The function supports both kubeconfig and in-cluster authentication:
  • If inCluster is true, uses in-cluster config.
  • If kubeconfig is set, uses the provided path.
  • One of these must be set; there is no default to ~/.kube/config.
• Logs add, update, and delete events for Deployments using zerolog.