Add (optional) verbose logging to debugger

[lggomez]

Currently, the debugger only logs info from some of the steps

Some additional info (like LocalVariables state/return, just to name an example) would be helpul when diagnosing issues with clients on headless servers, making it optional so the users don't get cluttered with log messages by default

I was thinking on a new --log-detail or --log-verbose parameter for that end, if it makes sense

[aarzilli]

The intended way to implement this would be to add options to --log-output.

[davidmichaelkarr]

If it matters, additional logging could possibly help for situations where delve doesn't appear to be working properly. In my situation, Delve seems to think it can't find any of my source files: https://stackoverflow.com/questions/69936099/debugging-go-in-vscode-doesnt-stop-at-breakpoints-says-could-not-find-file