User prompt for Interactive Commands #2268

If git rebase -i is run by the agent, then the command is run interactively and halts the agent. How about we allow the user to focus into commands and interact with them? This way an interactive command can be intervened by the proompter.

Eventually, opencode could just give the agent tools to interact with CLI that was run, but for now this could be useful until that tool is ship to prod and we inch further to AGI and cool coconuts on the beach.