Go 1.21 slog about protoactor-go

[rogeralsing]

Work in progress effort:

#937

In this PR. I made it so that users can set a LoggerFactory on the actor system Config.
This allows you to tweak the logger in any way you want.
The logger instance is then stored on the actor system itself. and re-used from there for all other modules.

[rogeralsing]

Related: https://www.reddit.com/r/golang/comments/15ud703/how_to_use_slog_in_a_library/

[nightwolfz]

This would create a convention of passing context to all actors methods in order to use the logger.
Not necessarily a bad thing.... just a heads up :)

Personally I like to keep it simple (switched custom logger to zap)