Add nodered-mcp chart (fgjcarlos/nodered-mcp)

MCP server exposing a Node-RED instance's admin API as agent tools.
Single Deployment + Service + Ingress, image tracked off the upstream
releases -- the tags are v-prefixed but the ghcr image tags are not,
hence the version-pattern.

MCP_HTTP_TOKEN is required rather than optional: upstream's listener
binds all container interfaces, so there is no loopback-trust mode. The
chart therefore requires existingSecret instead of defaulting it away.
readOnly defaults on, so an agent cannot deploy flows by accident.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

nodered-mcp/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