REFACTOR(storage): storage repo structure

- Add application.yaml for ArgoCD app-of-apps
- Add kustomization.yaml with storage components
- Add renovate.json for automated updates
- Update all component argocd.yaml repoURLs to storage repo

Components: longhorn, minio, postgresql, postgresql-dev, pgweb, cnpg,
velero

kustomization.yaml

@@ -0,0 +1,16 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - application.yaml
+  # Storage systems
+  - longhorn/argocd.yaml
+  - minio/argocd.yaml
+  # PostgreSQL databases
+  - postgresql/argocd/postgresql.yaml
+  - postgresql-dev/argocd.yaml
+  # Database tools
+  - pgweb/argocd.yaml
+  # Operators
+  - cnpg/argocd.yaml
+  - velero/argocd.yaml