use `tracing` for logging/tracing

[mainrs]

It is quite hard right now to actually follow along inside of logs and see what is going on when bugs occur. Maybe a more sophisticated solution might be worth looking into. I currently use tracing inside a hobby project and I really like it thus far. A simple function attribute and it traces all method calls by itself.

#[tracing::instrument]
fn name() {}

tracing does support a lot of "plugins" (measuring execution times, interop with log, ...).

However, the best selling point is the async support it does have. It makes it really easy to handle a multi-threaded environment.

This opportunity could be used to enable more user-friendly logging messages as well as adding more technical data that makes it easier to debug later on.

On that note, user-sensible data can also be filtered out properly when this is being pursued.

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