feat: add cert-manager

cluster/core/crds/cert-manager/kustomization.yaml

@@ -0,0 +1,5 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+# renovate: registryUrl=https://charts.jetstack.io chart=cert-manager
+- https://github.com/jetstack/cert-manager/releases/download/v1.3.0/cert-manager.crds.yaml

cluster/core/crds/kustomization.yaml

@@ -0,0 +1,4 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+- cert-manager