[DO-1431] add mermaid (!14)

[DO-1431]

Co-authored-by: denis.patrakeev <denis.patrakeev@avroid.tech>
Reviewed-on: https://git.avroid.tech/K8s/k8s-configs/pulls/14

clusters/k8s-avroid-office.prod.local/namespaces/mermaid/argocd-apps-mermaid-app.yaml

@@ -0,0 +1,44 @@
+---
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: mermaid
+  namespace: argocd
+  finalizers:
+    - resources-finalizer.argocd.argoproj.io
+spec:
+  project: mermaid
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: mermaid
+  sources:
+    - repoURL: https://git.avroid.tech/K8s/k8s-configs.git
+      targetRevision: master
+      path: clusters/k8s-avroid-office.prod.local/namespaces/mermaid/kustomize
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+      - ApplyOutOfSyncOnly=true
+      - CreateNamespace=true
+---
+apiVersion: argoproj.io/v1alpha1
+kind: AppProject
+metadata:
+  name: mermaid
+  namespace: argocd
+  # Finalizer that ensures that project is not deleted until it is not referenced by any application
+  finalizers:
+    - resources-finalizer.argocd.argoproj.io
+spec:
+  sourceRepos:
+    - https://git.avroid.tech/K8s/k8s-configs.git
+  # Only permit applications to deploy to the guestbook namespace in the same cluster
+  destinations:
+    - namespace: mermaid
+      server: https://kubernetes.default.svc
+  # Deny all cluster-scoped resources from being created, except for Namespace
+  clusterResourceWhitelist:
+    - group: ''
+      kind: Namespace