REFACTOR(deploy): move argocd manifests

- Reorganize ArgoCD application structure
- Move manifests to deploy/argocd folder

deploy/argocd/kustomization.yaml

@@ -0,0 +1,9 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  # App of Apps Application (self-managing)
+  - application.yaml
+
+  # Application deployments (prod and dev)
+  - application-dev.yaml