feat(kubernetes): add initial setup for ArgoCD, Cert-Manager, MetalLB, and Traefik

Signed-off-by: Tuan-Dat Tran <tuan-dat.tran@tudattr.dev>

roles/kubernetes_argocd/templates/app.yaml.j2

@@ -0,0 +1,19 @@
+---
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: "{{ item.name }}"
+  namespace: "{{ argocd_namespace }}"
+spec:
+  project: default
+  source:
+    repoURL: "{{ item.repo_url }}"
+    targetRevision: "{{ item.target_revision }}"
+    path: "{{ item.path }}"
+  destination:
+    server: "{{ item.destination_server }}"
+    namespace: "{{ item.destination_namespace }}"
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true