[FEATURE REQ] Configure gamma per monitor

[asmarcz]

**Is your feature request related to a problem?
I want to configure gamma temperature per monitor since my external monitor has different colour properties.
Describe the solution you'd like
Configure gamma properties per video output.
Describe alternatives you've considered
I have tried using monitor_override but believe it is tied to the sensor config.

[FedeDP]

Hi! Thanks for opening this feature request!
I think it would be a neat idea to rework Clight configuration to have a "monitor" structure with gamma temperatures and backlight curves, thanks for the hint!
I will try my best to provide such a feat in reasonable times given my limited spare time :)

[PanAeon]

Hi, I need the same feature, but not with the gamma, but with the curves, as my laptop screen not as bright as my desktop. If you need any help with this feature, please ping me (but I don't program in C usually)

Update: for my use case I can restart the clight process with the right config when the external screen is unplugged. I guess that will work. I looked into the codebase, and it seems there going to be a few changes to support multiple screens with different params... I'm thinking of array of conf_t and default config, where default values going to be merged with overrides .. What do you think?