Raw-rs: Add preprocessing and demosaicing steps (#1796)

* add subtract black step

* add scale colors step

* add raw to image step

* implement linear demosiacing and fix errors in previous code

* fix missing variable

* make dependencies of tests optional

* fix error in raw-rs tests

* fix typo in "demosiacing"

* use camera data from ADC and remove downloader

* cargo fmt

* use file_stem instead of file_name

* remove old camera data

* use equality instead of subtring to find model

* store camera_to_xyz in decimal form

* Code review

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

libraries/raw-rs/Cargo.toml

@@ -13,20 +13,24 @@ repository = "https://github.com/GraphiteEditor/Graphite/tree/master/libraries/r
 documentation = "https://docs.rs/raw-rs"
 
 [features]
-raw-rs-tests = ["libraw-rs"]
+raw-rs-tests = ["dep:image", "dep:libraw-rs", "dep:palette", "dep:reqwest"]
 
 [dependencies]
 # Local dependencies
 tag-derive = { path = "tag-derive" }
+build-camera-data = { path = "build-camera-data" }
+
+# Workspace dependencies
+thiserror = { workspace = true }
 
 # Required dependencies
 bitstream-io = "2.3.0"
 num_enum = "0.7.2"
-thiserror = "1.0"
 
-# Optional dependencies
-libraw-rs = { version = "0.0.4", optional = true } # Should be a dev dependency, but Cargo currently doesn't allow optional dev dependencies
+# Optional workspace dependencies
+image = { workspace = true, optional = true }
+reqwest = { workspace = true, optional = true }
 
-[dev-dependencies]
-# Required dependencies
-downloader = "0.2.7"
+# Optional dependencies (should be dev dependencies, but Cargo currently doesn't allow optional dev dependencies)
+libraw-rs = { version = "0.0.4", optional = true }
+palette = { version = "0.7.6", optional = true }