feat: add full kube-prometheus-stack helm chart manifests and templates

manifest/kube-prometheus-stack/charts/kube-state-metrics/templates/NOTES.txt

@@ -0,0 +1,23 @@
+kube-state-metrics is a simple service that listens to the Kubernetes API server and generates metrics about the state of the objects.
+The exposed metrics can be found here:
+https://github.com/kubernetes/kube-state-metrics/blob/master/docs/README.md#exposed-metrics
+
+The metrics are exported on the HTTP endpoint /metrics on the listening port.
+In your case, {{ template "kube-state-metrics.fullname" . }}.{{ template "kube-state-metrics.namespace" . }}.svc.cluster.local:{{ .Values.service.port }}/metrics
+
+They are served either as plaintext or protobuf depending on the Accept header.
+They are designed to be consumed either by Prometheus itself or by a scraper that is compatible with scraping a Prometheus client endpoint.
+
+{{- if .Values.kubeRBACProxy.enabled}}
+
+kube-rbac-proxy endpoint protections is enabled:
+- Metrics endpoints are now HTTPS
+- Ensure that the client authenticates the requests (e.g. via service account) with the following role permissions:
+```
+rules:
+  - apiGroups: [ "" ]
+    resources: ["services/{{ template "kube-state-metrics.fullname" . }}"]
+    verbs:
+      - get
+```
+{{- end }}