feat: support zsh alias

[Muffeter]

I'm trying to make alias work. I just write a zsh alias version for inshellisense. If it work well, i'll support other shell. : )

In zsh config :

# ~/.zshrc

#alias
alias t="echo hello"

and in the inshellisense :

[Muffeter]

@microsoft-github-policy-service agree

[cpendery]

This pr is affected by #79, and will be closed once the redesign is completed as history will be supported by default.