feat: add ArgoCD app-of-apps manifests for homelab GitOps deployment

Root application + project plus per-component Application CRs (Strimzi
operator, Kafka cluster, Redis, queue CRD/operator, management-service).

k8s/argocd/root.yaml

@@ -0,0 +1,22 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: kmsvc-root
+  namespace: cicd
+spec:
+  project: kmsvc
+  source:
+    repoURL: https://forgejo.riotpiao.homelab.com/rock/kafaka-management-service.git
+    targetRevision: main
+    path: k8s/argocd/apps
+    directory:
+      recurse: false
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: cicd
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+      - CreateNamespace=true