killianmuldoon: 📖 Add clusterClass operations guide to the book

JobBuild
5444
10-26 15:08
pull-cluster-api-apidiff-main 1453015590930223104
pull-cluster-api-build-main 1453653373260664832 1453015590896668672
pull-cluster-api-test-main 1453653373336162304 1453015590993137664
pull-cluster-api-test-mink8s-main 1453653373365522432 1453015591022497792
pull-cluster-api-verify-main 1453653373298413568 1453015590959583232