Help me add this [Enhancement] Improve Shell Interactive Mode UX, Speed & Features

[ravvdevv]

The current shell interactive mode is kinda buggy and rough around the edges.
While it technically works, it’s nowhere near ready for prime time.
It lacks the polish, performance, and features expected from a proper interactive shell.
This issue proposes a full upgrade to make it faster, cleaner, more user-friendly, and a hell of a lot more useful.