Add a color coordinate to the chaos game

All shader-related code has been removed; GPU entry points will be added once there's a better understanding of how the API should work.

Cargo.toml

@@ -1,7 +1,6 @@
 [workspace]
 members = [
     "enkou-shaders",
-    "enkou-shaders-tests",
 ]
 resolver = "3"
 
@@ -13,6 +12,7 @@ license = "MIT"
 repository = ""
 
 [workspace.lints.rust]
+missing_docs = { level = "warn" }
 unexpected_cfgs = { level = "allow", check-cfg = ['cfg(target_arch, values("spirv"))'] }
 
 [workspace.dependencies]
@@ -26,5 +26,4 @@ image = { version = "0.25.10", default-features = false, features = ["default-fo
 libm = "0.2.16"
 rand = { version = "0.10.1", default-features = false }
 rand_xoshiro = "0.8.1"
-rspirv = "0.13.0"
 tempfile = "3.27.0"