Expose shell integration command knowledge to extensions

[Tyriar]

Shell integration in the terminal could enable APIs like being able to listen to commands that run and get their output/exit code.

Rough example:

interface Terminal {
  executeCommand(command): Thenable<TerminalCommandResult>;
}

[ClockworkV]

I came here to request this, and here it is already.
Being in Backlog means it'll get on the work plan eventually?

Cheers, looking forward to this, it's the missing link for my 'debug last command line' extension!

[Tyriar]

@ClockworkV backlog means it's a valid item and it may be worked on in the future. I'm pretty sure this one will happen within the next year