[adrien-barret]

Adds argocd.enabled / argocd.org to rabbitmq 1.2.0 so the chart can be deployed by Argo CD through the Control Plane k8s operator, following the postgres/pgvector approach. Default (false) rendering is unchanged.

• Each resource template is wrapped in if not argocd.enabled and has an argocd-*.yaml sibling emitting cpln.io/v1 CRDs (identity, policy, volumeset, workload) with metadata.namespace = release namespace and org.
• The rabbitmq.conf secret becomes a native v1 Secret (Opaque, base64 data, cpln.io/org annotation, cpln-operator label).
• The volumeset carries cpln.io/resource-policy: keep so Argo prune does not delete queue data.
• No randomness in the base chart; credentials still come from the user-created credentialsSecretName prerequisite secret.

Verification: helm lint passes with argocd.enabled true and false; default render is identical (diff -w -B) to the argocd branch chart; Argo render parses as YAML with apiVersion and namespace on every resource, 5 resources (4 without volumeset), same count as default mode; missing argocd.org fails.

Not converted: nothing (all five templates converted). Risks: the keep annotation means the volumeset must be removed manually; the credentials secret must exist in Control Plane beforehand (unchanged).

Not validated against a live cluster.

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