Support SDK debug, specially for third-party internal features

[zoedsoupe]

Feature request

Is your feature request related to a problem? Please describe.

N/A

Describe the solution you'd like

supabase-js sdk have the auth.debug boolean flag to log internal steps from the auth client, what I'm proposing here is to add this flag globally for the client, to log internal steps like the Supabase.Fetcher that does a bunch of internal steps, parsing and so on.

Describe alternatives you've considered

just a proposal, I don't think it's blocking but can help debugging any possible error that arrives from these internal steps and don't raise any exception or clearly returns an error.

Additional context

while developing and implementing #54 I run into several minor issues like that, of course while developing the library these issues will be more common but somehow can be valuable for final users to track what the sdk in doing under the hoods.

[zoedsoupe]

cc @grdsdev

[zoedsoupe]

cc @filipecabaco

[grdsdev]

That's a nice addition, go for it.

[zoedsoupe]

nice! we can leverage the Logger built in module to control the level of the log, so we can emit different "debug" vela if logging and users can control it and also provide different backends for the logger, for example datadog, open telemetry or prometheus