Add debug logging

[CosminPerRam]

What is this feature about?
Debug logs are very useful in examining behavior in all kinds of possible use cases.
This helps in eventual user-encountered bugs.

Additional context/references
Add debug logging like in the Node version:



(just a simple example of logging something)

The log crate would be perfect for this, I don't know any better alternatives.

[cainthebest]

Is this for just debug logging as we could just add a cfg assertion and print it.

[cainthebest]

eg

fn debug_print<T: std::fmt::Debug>(msg: T) {
    if cfg!(debug_assertions) {
        println!("{:?}", msg);
    }
}

fn main() {
    debug_print("This will only be printed in debug mode");
}

[Douile]

the log crate would be perfect for this

There's also tracing but that is a lot more complex.

[CosminPerRam]

eg

I wouldn't use something like this as the user couldn't control this with their log facade.
Many libraries already use the log create for debug and stuff.

[cainthebest]

Debug logging has been implemented on #217 with log, it will be further refined as more is implemented. Will close this for now as completed