Display Squiggles for Invalid Command in Terminal Interface

[sarthakkimtani]

When a user enters an invalid command in the web app's terminal interface, we need to visually indicate this error by displaying squiggles beneath the invalid command. This will help users quickly identify that their input was incorrect.

NOTE: To be fixed later once the initial app goes live.

Reference Image:

[codeshaine]

can i try to tackle this issue ? If yes then do I need to underline the entire command or first word of the entire command ? And is it okay to make a list of valid commands in a file ?