howto: use R&D cluster

[moradology]

@jpolchlo is deploying a working cluster for R&D purposes which would be a useful testing ground for the knowledge and the examples we build. We should have some simple steps for connecting to a cluster, inspecting resources, and changing its state (this can be broken down into sub-issues if that's sensible). Ideally, we will have a sense of at least the relevant kubectl commands and some screenshots with a few words talking about what we're looking at in Lens when connected to this cluster