Verify Go Version

[mdwiltfong]

It would be helpful if the CLI could notify the user that they are potentially using an outdated version Go.

For example, in this lesson I spent a lot of time trying to debug why the tests were failing only to find a hint in the Discord that maybe my Go version was the issue. I was using 1.21 when upgrading it to 1.22.5 resolved the issue.

I think it would be beneficial to offer a command to check this, and then potentially update the lessons to guide learners to use this command.