Plugin architecture

[tjtelan]

Plugins are a long-term goal. This issue will be for the design of the user experience for installation, packaging and how they are referenced in the orb.yml, as well as the implementation on the server-side.

[tjtelan]

Other systems like Drone and Github Actions and Concourse use Docker containers with a blackbox input/output design. While I think this is a good idea, I'm also leaning towards a solution that isn't constrained to being container-based.

I was thinking along the lines of kubernetes kubectl plugins.
https://kubernetes.io/docs/tasks/extend-kubectl/kubectl-plugins/