Refactor Argo CD application configuration to adopt a multi-source approach for noble-platform, removing Helm chart definitions from kustomization.yaml. Update noble-platform.yaml to directly reference Helm chart sources and clarify documentation in README.md and apps/README.md regarding the new structure and resource representation in the UI.

clusters/noble/apps/kustomization.yaml

@@ -1,6 +1,5 @@
-# Single Argo CD **source** (**noble-platform** → **path: clusters/noble/apps**) so the UI shows the
-# full resource tree. Helm charts are inlined via **helmCharts**; requires **argocd-cm**
-# **kustomize.buildOptions: --enable-helm** (see **bootstrap/argocd/values.yaml**).
+# Plain Kustomize only (namespaces + extra YAML). Helm charts are **Application** sources in
+# **bootstrap/argocd/apps/noble-platform.yaml** — avoids **kustomize --enable-helm** on repo-server.
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 
@@ -16,60 +15,3 @@ resources:
   - grafana-loki-datasource/loki-datasource.yaml
   - vault/unseal-cronjob.yaml
   - vault/cilium-network-policy.yaml
-
-helmCharts:
-  - name: kube-prometheus-stack
-    repo: https://prometheus-community.github.io/helm-charts
-    version: 82.15.1
-    releaseName: kube-prometheus
-    namespace: monitoring
-    valuesFile: kube-prometheus-stack/values.yaml
-    includeCRDs: true
-  - name: loki
-    repo: https://grafana.github.io/helm-charts
-    version: 6.55.0
-    releaseName: loki
-    namespace: loki
-    valuesFile: loki/values.yaml
-  - name: fluent-bit
-    repo: https://fluent.github.io/helm-charts
-    version: 0.56.0
-    releaseName: fluent-bit
-    namespace: logging
-    valuesFile: fluent-bit/values.yaml
-  - name: sealed-secrets
-    repo: https://bitnami-labs.github.io/sealed-secrets
-    version: 2.18.4
-    releaseName: sealed-secrets
-    namespace: sealed-secrets
-    valuesFile: sealed-secrets/values.yaml
-  - name: external-secrets
-    repo: https://charts.external-secrets.io
-    version: 2.2.0
-    releaseName: external-secrets
-    namespace: external-secrets
-    valuesFile: external-secrets/values.yaml
-  - name: vault
-    repo: https://helm.releases.hashicorp.com
-    version: 0.32.0
-    releaseName: vault
-    namespace: vault
-    valuesFile: vault/values.yaml
-  - name: kyverno
-    repo: https://kyverno.github.io/kyverno/
-    version: 3.7.1
-    releaseName: kyverno
-    namespace: kyverno
-    valuesFile: kyverno/values.yaml
-  - name: kyverno-policies
-    repo: https://kyverno.github.io/kyverno/
-    version: 3.7.1
-    releaseName: kyverno-policies
-    namespace: kyverno
-    valuesFile: kyverno/policies-values.yaml
-  - name: headlamp
-    repo: https://kubernetes-sigs.github.io/headlamp/
-    version: 0.40.1
-    releaseName: headlamp
-    namespace: headlamp
-    valuesFile: headlamp/values.yaml