Import `remote-console` from CSM

[evanmcc]

This first issue is to clarify the current state of the repo:

• This is a mashup of console-operator, console-data, and console-node, with -data mostly discarded.
• The README I think comes from one of those and needs to be rewritten.
• The integration tests currently do nothing other than build and run, but none of the tests are relevant to the current code.
• There is still code in internal/ that belongs to those services and needs to be confirmed to be irrelevant and deleted.
• This is basically the first version to compile; it is not currently expected to work.

Places where I could use help:

• Thinking through the node types. I rewrote River, Mountain, and Paradise into things like PassSSH, CertSSH, and IPMINode, but there's probably more and it's not clear that the data the service is relying on is included in OC-SMD.
• Pointers to existing test code that we can use to exercise the service.
• Pointing out non-idiomatic go usage.
• Pointers on how to clean up the various licensing statements in a coherent and legal way.

First release tasks should go into subissues for now.