Command line page should explain how to install bash and zsh completions

[Tyriar]

https://code.visualstudio.com/docs/editor/command-line doesn't mention completions but we have bash and zsh ones that are shipped to Linux (not macOS for some reason?). These would be good to have available on all platforms that support them. I don't have a machine atm to test if they're automatically picked up on Linux or need manually hooking up.

[joaomoreno]

Yeah makes sense. I think we never added them to macOS since that would require some sort of installation step. Maybe we pull it off by including them in Contents and have a command to install them, just like the CLI command.

[Tyriar]

Good to know, sounds like we could automatically activate it via shell integration then

[Tyriar]

Closing since the new terminal suggests won't depend upon this.