Fix error handling in CLI

[optimm]

Some CLI errors were printed using println! , causing them to be indistinguishable from regular output. To resolve this, the code has been updated to use eprintln! and exit code 1 for error messages. By printing errors to the standard error, error messages are now clearly separated from regular output.

[sr-gi]

Add a description / rationale for the change

[sr-gi]

Looks good, but I think it may be worth creating a function to encapsulate the printing + exit logic.

@optimm any progress on this?

[optimm]

Looks good, but I think it may be worth creating a function to encapsulate the printing + exit logic.

@optimm any progress on this?

Will make the required changes today

[sr-gi]

ACK 380c0d9

[sr-gi]

@optimm we require commits to be signed in order to be merged to master. Check the docs on how to sign commits and rebase