Client should support Tab-based command-line completion

[tonyespy]

It would be really nice given the length of the some the commands if edgex-cli could support command-line Tab completion when run from shells that support it.

For more details on Tab command-line completion and Go please see:

https://blog.jbowen.dev/2019/11/bash-command-line-completion-with-go/

Version: v1.0.0-dev.28