Add support for print command in local (command line -d) debugger

[wenqiangwang]

• Bugsquad edit, fixes: 'print' command in command line debugger does not show anything #73389

[wenqiangwang]

This is an attempt to reopen PR #73729 after the branch deleted

[wenqiangwang]

Thank for the feedback, everyone. The comments are now resolved.

[wenqiangwang]

With the change, we can evaluate expressions in local debugger like in the screenshot below:

[wenqiangwang]

Can you please approve or give feedback?

[wenqiangwang]

@akien-mga, at the moment, do you think there is anything I can do to get this change in? Thanks.

[akien-mga]

You can squash the commits to make the PR ready to merge. But it still requires an approval for a maintainer, which needs some time. I plan to test it myself to confirm the fix, but I'm quite busy, so I can't say when I will do it.

[dalexeev]

Looks good to me. There are differences between GDScript and Expression, so it would be ideal to implement this separately (parsing and compiling individual GDScript expressions). But since we don't have a foundation for this, it might make sense to use Expression for now. Especially since the recently merged REPL (#97647) also uses Expression.

[akien-mga]

Looks good to me!

Sorry for the delay, I was on leave in October.

[wenqiangwang]

Thanks for looking, everyone!

[Repiteo]

Thanks! Congratulations on your first contribution! 🎉

[akien-mga]

And thanks for your patience with our slow review process :)