feat(shell): Add prefix in shell to indicate user is in the container environment

[VoVAllen]

Description

After midi up, the shell environment is almost identical between inside container vs outside container. We can change the PS1 environment variable to show something like ->(midi dev) MIDI to let user know they're already in the container env

[gaocegege]

Should we update ~/.zshrc to implement the feature?

[gaocegege]

We can play tricks with $PS1

https://www.cyberciti.biz/tips/howto-linux-unix-bash-shell-setup-prompt.html

[kemingy]

If we have lots of shell prompt requirements, maybe can consider starship