feat(nextcloud): Add initial version of nextcloud deployment

apps/base/nextcloud/database.yaml

apps/base/nextcloud/kustomization.yaml

apps/base/nextcloud/namespace.yaml

apps/base/nextcloud/networkpolicy.yaml

apps/base/nextcloud/release.yaml

apps/base/nextcloud/repository.yaml

apps/k8s01/nextcloud/certificate.yaml

apps/k8s01/nextcloud/kustomization.yaml

apps/k8s01/nextcloud/nextcloud-values.yaml