[Feature] Multiple Overlays and Overlay Selection

[TanmoySG]

A project/deployment might have multiple overlays, eg - prod, non-prod, etc. Add way to define the overlay names and their paths centrally and in the Action with section, some parameter like overlay or selectedOverlay to pick the overlay by name.

[Checkpoints]

• TBD

[Example]

- name: Kubernetes Deployment
  uses: TanmoySG/[email protected]
  with:
    kubeconfig: path/to/kubeconfig
    namespace: 'default'
    kustomize: true
    overlays:
      - prod : deploy/overlays/prod
      - non-prod : deploy/overlays/non-prod
    overlay: prod

Something like this, or

- name: Kubernetes Deployment
  uses: TanmoySG/[email protected]
  with:
    kubeconfig: path/to/kubeconfig
    namespace: 'default'
    kustomizations: 
      - prod : deploy/overlays/prod
      - non-prod : deploy/overlays/non-prod
    use: prod