better code analyzer

[APerricone]

to find unused locals, and make them gray

I will implement it if it gain 10 thumbs up

[mlacecilia]

I'm suggesting to avoid this implementation because the effort is unneeded at least for people compiling with MinGW. The recent versions are already reporting not only the unused locals, but also the unneeded assignments.

[APerricone]

Many thanks for your feedback, harbour itself report unused variable, but doing some refactor I see that is a little intricate use it with VSCode

[VictorCasajuanaMas]

this feature it works with vscode by default.