Merge branch 'docs-redesign-followon' into 'master'

CONTRIBUTING.md

README.md

docs/README.md

docs/developer/README.md

docs/developer/Testing.md

docs/developer/ci-workflow.md

docs/developer/k8s-storage.md

docs/developer/package-integration/documentation.md

...package-integration/package-integration-helm-standards.md

...oper/package-integration/package-integration-ownership.md

docs/guides/airgap/README.md

docs/guides/airgap/k3d.md

docs/guides/backup-and-restore/gitlab-backup-restore.md

.../guides/backup-and-restore/nexus-migration-with-velero.md

docs/guides/deployment-scenarios/sso-quickstart.md

docs/guides/using-bigbang/values-guide.md

docs/prerequisites/default-storageclass.md

docs/prerequisites/pod-usage-in-grafana.md

docs/understanding-bigbang/README.md

.../architecture-diagrams/kube-apiserver-webhooks-diagram.md