Add node-red Helm chart

Adds a standalone chart for Node-RED (Deployment, Service, PVC, Ingress)
with image version tracked via the version-source annotation for
scripts/update-charts.sh.

node-red/templates/service.yaml

@@ -0,0 +1,16 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ .Release.Name }}
+  labels:
+    app.kubernetes.io/name: {{ .Chart.Name }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+spec:
+  type: {{ .Values.service.type }}
+  selector:
+    app: {{ .Release.Name }}
+  ports:
+    - name: http
+      port: {{ .Values.service.port }}
+      targetPort: http
+      protocol: TCP