HDR logger subsystem

[low-batt]

What you want IINA to do:
Use a "hdr" logger subsystem for HDR related log messages, so log message look like:

18:19:25.544 [hdr][d] Will activate HDR color space instead of using ICC profile

What IINA does currently:
HDR related log messages use the generic "iina" logger subsystem and include a "HDR:" prefix in the message:

18:03:42.359 [iina][d] HDR: Will activate HDR color space instead of using ICC profile

Why you think this should be added:
Seems more consistent with how IINA groups log messages that relate to a certain subsystem.

[CarterLi]

Logs in FFmpegController were not modified