While this truly breaks the point of the backwards compatible stuff with
protobuf, it does not seem worth it to attempt to glue together a
compatible API.
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
This commit adds proto rpc definitions for the communication needed for
the CLI interface.
This will allow us to move the rest of the CLI interface over to gRPC
and in the future allow remote access
