feat(chart): guard ai-secrets template behind ai.enabled (#161)

Fixes: #160

Wrap the `ai-secrets` Secret manifest with a `.Values.ai.enabled` conditional
so it is not rendered when AI is disabled. This prevents clashes with
pre-existing `ai-secrets` owned by other releases and keeps templates clean.

Author: danc094codetogether

charts/intel/templates/secrets.yaml

@@ -1,3 +1,4 @@
+{{- if .Values.ai.enabled }}
 apiVersion: v1
 kind: Secret
 metadata:
@@ -14,3 +15,4 @@ data:
   external-ai-key: {{ .Values.ai.external.api_key | b64enc }}
   {{- end }}
   {{- end }}
+{{- end }}