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

template/templates/kubernetes/flux/repositories/helm/csi-driver-nfs.yaml.j2

@@ -0,0 +1,9 @@
+---
+apiVersion: source.toolkit.fluxcd.io/v1beta2
+kind: HelmRepository
+metadata:
+  name: csi-driver-nfs
+  namespace: flux-system
+spec:
+  interval: 1h
+  url: https://raw.githubusercontent.com/kubernetes-csi/csi-driver-nfs/master/charts

template/templates/kubernetes/flux/repositories/helm/kustomization.yaml.j2

@@ -6,6 +6,7 @@ resources:
   - ./bjw-s.yaml
   - ./cilium.yaml
   - ./coredns.yaml
+  - ./csi-driver-nfs.yaml
   - ./external-dns.yaml
   - ./grafana.yaml
   - ./hajimari.yaml