feat: add support for cluster user secrets and settings (#858)

Co-authored-by: Devin Buhl <onedr0p@users.noreply.github.com>
Co-authored-by: Devin Buhl <devin@buhl.casa>

bootstrap/templates/kubernetes/flux/vars/kustomization.yaml.j2

@@ -2,4 +2,6 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
   - ./cluster-settings.yaml
+  - ./cluster-settings-user.yaml
   - ./cluster-secrets.sops.yaml
+  - ./cluster-secrets-user.sops.yaml