Component: Debugging

[StachuDotNet]

Dark doesn't have a great debugging experience right now.

We have no support for breakpoints and step-debugging, and runtime errors are often opaque.
Dark-classic had some almost-excellent debuggability through the use of our Traces, but those aren't yet accessible in dark-next.

Once the baseline editing experience has advanced a bit, we need to circle back here, starting with how Traces fit into the debugging experience.

• review old #3778