Add use_scene_referred to zimg_graph_builder_params

[Setsugennoao]

As the title says, adds this param to the public API.

I also edited the test example to include it.
I don't know if you didn't want the changelog to be updated, I can remove it ^^

[Setsugennoao]

Hi, is there anything I should modify for it to be merged? Is this not planned or wanted in the API?

[sekrit-twc]

scene_referred will be added when a verified use case arises. Otherwise, there will be much untested code exposed.

[NSQY]

scene_referred will be added when a verified use case arises. Otherwise, there will be much untested code exposed.

The original want for this option stems from this Doom9 thread: https://forum.doom9.org/showthread.php?p=1972723#post1972723

For what it's worth, AVS+ users have had access to this code for approximately a year. I will contact the maintainer to confirm.

[NSQY]

No known problems reported with the AVS+ build. Testing may be limited to the aforementioned post.