[v2] initial CRD generation

[lucasreed]

Using kubebuilder, create initial CRD manifests based on the design in DESIGN.md

[isaaguilar]

I'm really interested in this idea. I created an astro-ruleset-operator for my job which takes a new resources (called the "ruleset" CRD) and translates that to the astro-data ConfigMap. I feel that this new v2 proposal would be a much better approach because the controller should just act on the custom resource directly and doesn't need to worry about the ConfigMap.

I'm looking forward to updates if this gains any traction. I'm willing to help if there are any tasks for v2.