Autocompletion for CLI commands and auto-suggesting for mispellings

[zelima]

We want to two extra features for our CLI commands:

• auto suggesting on mis-spelt commands
• Bash command line completions

Acceptance Criteria

• [ ] if user types datahub gte it should output

  
  datahub: 'gte' is not a datahub command. See 'datahub --help'.

Did you mean this? get

* [ ] if user types `datahub ge` and hits tab it should autocomplete to `datahub get`

## Tasks

* [ ] research commander docs if it already provides any of them
* [ ] research if there already is Node libraries that will help
  * correct typo https://github.com/inca/did-you-mean

[anuveyatsu]

We haven't worked on that issue yet, but still a desirable option so keeping the issue open.