Revert "remove network policies for now"

This reverts commit 665de9090a.

kubernetes/rpi5-cluster/apps/cilium/ks.yaml

@@ -12,4 +12,19 @@ spec:
     kind: GitRepository
     namespace: flux-system
     name: home-cluster-ops
-
+---
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: cilium-networkpolicies
+  namespace: kube-system
+spec:
+  interval: 1h
+  path: ./kubernetes/rpi5-cluster/apps/cilium/networkpolicies
+  prune: true
+  sourceRef:
+    kind: GitRepository
+    namespace: flux-system
+    name: home-cluster-ops
+  dependsOn:
+    - name: cilium-app