Starting a Kubernetes course on a local kind cluster

Set up my Kubernetes Learning Lab repo. It's a hands-on course that runs on a three-node kind cluster on my laptop: fourteen modules from Pods and Gateway API routing through RBAC, Helm, Prometheus and Argo CD, then a troubleshooting lab with six broken apps. The course material is the first commit. Everything after that is my own notes and exercise work, one module at a time. It ends with a capstone, kube-tasks, in its own repo.