Raw-rs: add post-processing steps (#1923)

* add convert_to_rgb step

* add code to generate gamma correction curve

* add gamma correction step

* fix clippy warnings and cargo fmt

* remove unnecessary dependencies

* Code review 1

* Code review 2

* fix the order of operations

* Code review 3

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Co-authored-by: Keavon Chambers <keavon@keavon.com>

libraries/raw-rs/src/demosaicing/linear_demosaicing.rs

@@ -73,5 +73,7 @@ fn linear_demosaic_rggb(mut raw_image: RawImage) -> Image<u16> {
 		data: raw_image.data,
 		width: raw_image.width,
 		height: raw_image.height,
+		rgb_to_camera: raw_image.rgb_to_camera,
+		histogram: None,
 	}
 }