stdout/stderr based on log level

[fireflycons]

Hi @phuslu

Here's another suggestion 😁

Some log forwarders like filebeat can switch on the stream on which logs are emitted. It would be nice if for the standard logger type we could select the output stream based on the log level, e.g. severity of warning or higher goes to stderr and lower levels go to stdout. User can set at which level the change from stdout to stderr happens.

[phuslu]

looks like multiple-dispatching-writer does
https://github.com/phuslu/log?tab=readme-ov-file#multiple-dispatching-writer

let me check it can meet the requirement or we could enhance the writer.

[phuslu]

After consideration, I think it's no needed to introduce a new Writer but worth to add a helper/type function to make it easier.

So I add a commit df27c52

@fireflycons could you please take a look the example here https://github.com/phuslu/log?tab=readme-ov-file#customize-the-log-writer ? If OK, I'd like release a new tag.

[fireflycons]

Nice - go for it!

[phuslu]

v1.0.93 tagged/released, thanks