feat: add d4r inference engines and Windows parity tooling

Add native K/M/RR inference engines, HIP kernels, replay and validation
harnesses, and Windows DLSS setup and runtime support. Include GPU
profiling tools, build and packaging scripts, platform integration
patches, and implementation documentation.

engine/output_store.glsl

@@ -0,0 +1,17 @@
+// RADV's rgba16f image stores truncate before the copy path's UNORM conversion.
+// Preserve that half-store + blit result when writing RGB10A2 directly. Below
+// binary16's normal range both 10-bit RGB and 2-bit alpha quantize to zero, and
+// overflow saturates, so a normal-range mantissa mask suffices for this format.
+#ifndef OUTPUT_RGB10
+#define OUTPUT_RGB10 0
+#endif
+#if OUTPUT_RGB10
+#define FINAL_OUTPUT_FORMAT rgb10_a2
+vec4 finalOutputValue(vec4 value) {
+    vec4 rounded = uintBitsToFloat(floatBitsToUint(value) & 0xffffe000u);
+    return mix(rounded, value, isnan(value));
+}
+#else
+#define FINAL_OUTPUT_FORMAT rgba16f
+#define finalOutputValue(value) (value)
+#endif