add verboseMode & is_stdout_verbose() check to GODOT_LOG

[2shady4u]

This is my suggestion to add output suppression to the FMOD plugin as discussed in #74
I'm using two variables for following reason:

• Sometimes I want to see the FMOD output in the console without putting my Godot editor in verbose mode. Setting verbose stdout in Godot dumps to much other stuff to the console that might not be relevant to the matter at hand (= debugging FMOD issues)

• When running Godot in verbose mode (-v) you evidently want all FMOD output to be dumped to the console without having to set the verbose_mode to true.

Other proposals/modifications by owners are ofc welcome!

[bitbrain]

LGTM - do we want to add some documentation, too? Maybe to the README for now?

[CedNaru]

I think I would prefer going beyond and have 3 modes for Fmod.
VERBOSE, INHERITED, QUIET.
Inherited would basically follow Godot's settings and would be the default value.

[2shady4u]

I think I would prefer going beyond and have 3 modes for Fmod. VERBOSE, INHERITED, QUIET. Inherited would basically follow Godot's settings and would be the default value.

That's a good idea! I like this

[bitbrain]

@2shady4u Any progress with this?

[2shady4u]

I think that this PR has outlived its welcome.
Additionally, I'm currently not in a good position (time-wise) to finish this PR.
Now with the upcoming port to 4.0, most of the macro functions will become obsolete.

If anyone is willing to implement this in a future PR, please feel free to check out this PR for inspiration.