REFACTOR(repo): restructure monitoring folder

- and add namespace resou...
- Remove argocd/, helm-values/, ingress/ subdirectories
- Move files to parent directory (argocd.yaml, helm-values.yaml,
  ingress.yaml)
- Update helm valueFiles paths in ArgoCD Applications
- Add namespace.yaml to all applications with Goldilocks labels
- Update destination namespaces to match folder names
- Update kustomization.yaml files to reference new structure

promtail/argocd.yaml

@@ -0,0 +1,26 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: promtail
+  namespace: argocd
+spec:
+  project: default
+  sources:
+    - repoURL: https://grafana.github.io/helm-charts
+      chart: promtail
+      targetRevision: 6.16.6
+      helm:
+        valueFiles:
+          - $values/promtail/helm-values.yaml
+    - repoURL: https://gitea0213.kro.kr/bluemayne/monitoring.git
+      targetRevision: HEAD
+      ref: values
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: promtail
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+      - CreateNamespace=true