CLI (~/cli)

• Add auto-completion for most common args like device and logical device ids
• Add consistent argument checking
• Unify code that retrieves data from gRPC
• Unify code that prints out data/response, to allow:
  • Selectable output mode:
    • JSON
    • Tabular
• Organize history per sub context so that in each context the commands entered in that context will show
• Metaprogramming [BIG ONE]: Make large part of the commands come from annotations embedded in the protobuf files and have corresponding handler auto-generated by protoc
• Package CLI as docker container, bake it into composition