[GSoC] Interactive mode should only run in an interactive shell

Tests are currently blocked on the `feature/interactive` branch because the interactive mode is always on. It should only run when the command is executed in an interactive shell.

Start on the feature/interactive branch and trace where interactive mode is enabled for command execution. Check the blocked tests to determine how shell interactivity is represented. Done means interactive mode runs only when the command is executed in an interactive shell, while non-interactive test execution remains unaffected.

Written by the indexing model from the issue text.