REFACTOR(repo): security repo structure

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

Components: authelia, vault, external-secrets, falco, trivy

external-secrets/argocd.yaml

@@ -20,7 +20,7 @@ spec:
     helm:
       valueFiles:
       - $values/external-secrets/helm-values.yaml
-  - repoURL: https://github.com/K3S-HOME/cluster-infrastructure.git
+  - repoURL: https://github.com/K3S-HOME/security.git
     targetRevision: main
     ref: values
   destination: