feat(kubenav): Add dashboards for mobile monitoring

infrastructure/kubenav/kustomization.yaml

+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: kubenav-system
+resources:
+  - namespace.yaml
+  - https://git.shivering-isles.com/github-mirror/kubenav/deploy/-/raw/ed66ab3bf470fe7a43c6990e39d158b249f5ff7c/dashboards/prometheus-dashboard.yaml
+  - https://git.shivering-isles.com/github-mirror/kubenav/deploy/-/raw/ed66ab3bf470fe7a43c6990e39d158b249f5ff7c/dashboards/cert-manager-dashboard.yaml
+  - https://git.shivering-isles.com/github-mirror/kubenav/deploy/-/raw/ed66ab3bf470fe7a43c6990e39d158b249f5ff7c/dashboards/nginx-ingress-request-handling-performance-dashboard.yaml
+  - https://git.shivering-isles.com/github-mirror/kubenav/deploy/-/raw/ed66ab3bf470fe7a43c6990e39d158b249f5ff7c/dashboards/nginx-ingress-dashboard.yaml

infrastructure/kubenav/namespace.yaml

+apiVersion: v1
+kind: Namespace
+metadata:
+  name: kubenav-system
+  labels:
+    name: kubenav-system
+    kyverno.shivering-isles.com/class: "system"

infrastructure/kustomization.yaml

@@ -13,3 +13,4 @@ resources:
   - flux-system
   - k8up
   - postgres
+  - kubenav