render: add perspective UV interpolation and derivatives (#1461)

Co-Authored-By: selune <0xlillith@users.noreply.github.com>
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

crates/render/src/lib.rs

@@ -14,6 +14,7 @@ mod raster;
 pub mod studio;
 pub mod surface;
 pub mod texture_input;
+pub mod texture_interpolation;
 
 pub use backend::{
     Availability, BackendDescriptor, BackendId, ExecutorDescriptor, ExecutorId, MAX_RENDER_ID_BYTES, RenderFeature, RenderFormat, RenderLimits,