Create macros for algorithm tracing steps

[adamconkey]

In the algorithm tracing added in #84 I have the log calls that look like this:

debug!(
    "{}",
    GrahamScanStep {
         idx: idx + 1,
         new_id: Some(new_v.id),
         hull_ids: stack.clone(),
    }
);

Would like to create macros to really tighten that up, for example:

log_graham_step!(idx + 1, new_v.id, stack.clone())

Perhaps there is a cool way to implement such that you wouldn't have to define a unique one per algorithm, but for now I'm okay with doing that as a simple approach, and will immediately gain from the cleanup in the algorithm code.

[adamconkey]

This is a lovely addition, now the log steps in the code are literally one-liners, really cuts down on the clutter which is exactly what I wanted.