Add documentation show how to use chrome://tracing

[y2kappa]

I only heard about this one month ago so I assume most people are unfamiliar. Documentation with gifs are welcome.

[yonip23]

Why not generate a plot using https://github.com/milliams/plotlib or something similar?

[y2kappa]

It's a good idea, I think we can add an output parameter of how you want to deliver it.

I'd like to keep chrome://tracing as an option for two reasons:

1. For myy main use case, I can only print to console, I have no filesystem to save on - it's a docker container / aws lambda function.
2. Also, chrome://tracing is pretty sweet, has a lot of built in stuff and interactivity. You can click on individual spans and it shows you the total duration, metadata, etc.

By the way, did you check chrome://tracing with this crate to see how it feels? What do you think a plot can do that chrome://tracing can't?

[yonip23]

Haven't tried chrome tracing yet, mainly bc I work with firefox... That's also why I don't know if plots have any advantage here. It's just a widely accepted way of viewing your data.

There is Python's Plotly library which is very rich and easy quite easy to work with, maybe it's a good idea to add a python script to this crate, something like ./visualize.py or something.

(Of course, in addition to chrome tracing, which sounds good)