Enrich / Customize / Override the function name

[y2kappa]

A lot of functions are called new and they can be expensive, like getting a network db handle. it's very unclear what happens when a lot of news appear in your flamegraph.

For that there are 2 options that I see:

1. Allow overriding from the derive attributes

#[timed::timed(printer = "info!", tracing=true, name="whatever")]

2. Also (not exclusive to the above), add full module path to this. instead of recording it as "new", record it as "foo::bar::new". There is a macro for this, not sure if it works https://doc.rust-lang.org/std/macro.module_path.html