feat: add csi-driver-nfs addon (#837)

template/vars/addons.sample.yaml

@@ -10,7 +10,7 @@ hajimari:
 # https://github.com/grafana/grafana
 grafana:
   enabled: false
-  # password:
+  # password: # admin password
 
 # https://github.com/prometheus-community/helm-charts/tree/main/charts/kube-prometheus-stack
 kube_prometheus_stack:
@@ -23,4 +23,12 @@ kubernetes_dashboard:
 # https://github.com/weaveworks/weave-gitops
 weave_gitops:
   enabled: false
-  # password:
+  # password: # admin password
+
+# https://github.com/kubernetes-csi/csi-driver-nfs
+csi_driver_nfs:
+  enabled: false
+  # storage_class:
+  #   - name: # name of the storage class (lower-kebab-case)
+  #     server: # dns name or ip address of nfs server
+  #     share: # exported share (path)