REFACTOR(repo): restructure infra folder structure

- Remove argocd/, helm-values/, ingress/ subdirectories
- Move files to parent directory with standardized names
- Add namespace.yaml to all apps with Goldilocks labels
- Preserve vault/ subdirectories (falco, velero)
- Update main kustomization.yaml to reference argocd.yaml files directly
- Comment out argocd.yaml in each app's kustomization.yaml to prevent
  circular reference

Applications restructured:
- cert-manager (2 ArgoCD apps)
- external-secrets
- reloader
- vault (2 ArgoCD apps)
- velero (2 ArgoCD apps)
- falco
- cnpg
- haproxy
- metallb
- vpa
- argocd

argocd/kustomization.yaml

@@ -2,5 +2,6 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 
 resources:
+  - namespace.yaml
   - argocd-cmd-params-cm.yaml
-  - ingress/argocd-server-ingress.yaml
+  - ingress.yaml

argocd/namespace.yaml

@@ -0,0 +1,6 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: argocd
+  labels:
+    goldilocks.fairwinds.com/enabled: "true"

cert-manager/kustomization.yaml

@@ -2,8 +2,9 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 
 resources:
-  # ArgoCD Application 리소스는 infrastructure/kustomization.yaml에서 관리
-  # - argocd/cert-manager.yaml
-  # - argocd/cert-manager-issuers.yaml
+  # argocd.yaml files은 수동으로 관리 (순환 참조 방지)
+  # - argocd-certmanager.yaml
+  # - argocd-issuers.yaml
+  - namespace.yaml
   - cluster-issuer-prod.yaml
   - cluster-issuer-staging.yaml

cert-manager/namespace.yaml

@@ -0,0 +1,6 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: cert-manager
+  labels:
+    goldilocks.fairwinds.com/enabled: "true"