REFACTOR(repo): move vault/ to manifests/

- Move ExternalSecret file from vault/ to manifests/secret.yaml
- Update kustomization.yaml references
- Remove vault/ folder

Apps: authelia

authelia/kustomization.yaml

@@ -1,7 +1,7 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
-- vault/authelia-secrets.yaml
+- manifests/secret.yaml
 - manifests/config.yaml
 - manifests/middleware.yaml
 - manifests/rbac.yaml