Add a plugin to watch and display Cluster API v1alpha3 objects

[vincepri]

I'd love to use Octant to get a bird view of all my clusters spanning across cloud providers, check their status, and more. If anyone tackles this, I'd suggest to start using the (unreleased) v1alpha3 API types.

[vrabbi]

Is there any plan to add such a plugin? Having CAPI native/plugin support would be awesome!!! The complexity and simply the number of objects that build up a CAPI cluster can be confusing to many people. Having a plugin that would show the hierarchy and structure of CAPI would be amazing.

[wwitzel3]

This has the potential to be a very fun project. Essentially it would be writing a CAPI plugin. I know this idea has been explored in the past, but not sure anything ever came of them.

[vrabbi]

this should now probably be done if and when it is with the v1alpha4 api as that is now the latest stable API version of CAPI. while not all infra providers support v1alpha4 yet they are moving in that direction so the implementation being forward looking would be the preferable route i think