feat(argocd): migrate ingress-nginx to full GitOps management

- Create ArgoCD Application for ingress-nginx controller (wave 0)
- Source: GitHub repo + Helm chart with local values file
- Adopts existing bootstrap Helm release (no downtime)
- Enables automated sync and self-heal for nginx configuration

k8s/argocd/apps/00-ingress-nginx.yaml

@@ -0,0 +1,42 @@
+# Wave 0 — Nginx Ingress Controller
+# Foundational infrastructure required for all ingress resources and ArgoCD UI access.
+# Must be wave 0 to ensure LoadBalancer IP is available before other apps deploy.
+---
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: ingress-nginx
+  namespace: argocd
+  annotations:
+    argocd.argoproj.io/sync-wave: "0"
+  finalizers:
+    - resources-finalizer.argocd.argoproj.io
+spec:
+  project: homelab
+  revisionHistoryLimit: 3
+  sources:
+    - repoURL: https://kubernetes.github.io/ingress-nginx
+      chart: ingress-nginx
+      targetRevision: "4.15.1"
+      helm:
+        valueFiles:
+          - $values/k8s/bootstrap/ingress/nginx-values.yaml
+    - repoURL: https://github.com/Riotpiaole/riotpiao.homelab.com.git
+      targetRevision: main
+      ref: values
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: ingress-nginx
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+      - CreateNamespace=true
+      - ServerSideApply=true
+    retry:
+      limit: 3
+      backoff:
+        duration: 10s
+        factor: 2
+        maxDuration: 3m