Support Autocomplete for bash and zsh

[nqminhuit]

https://picocli.info/autocomplete.html

According to the picocli author, we need to write additional bash function on top of generated code from picocli. Or integrate with https://github.com/jline/jline3

[nqminhuit]

zsh ref:

• https://mrigank11.github.io/2018/03/zsh-auto-completion/