rr: add FSR Ray Regeneration, exact RDNA3 inference and motion experiments

Add an experimental FSR Ray Regeneration backend for D3D12 RR requests:
- Convert depth, motion, normals and albedos into AMD denoiser inputs.
- Split and recompose diffuse/specular signals, then run Super Sampling.
- Add stability/detail controls, demodulation guards and halo limiting.
- Handle AMD provider discovery under NVIDIA GPU spoofing.
- Add runtime probes, synthetic reference scenes and per-dispatch profiling.

Add exact gfx11 DLSS-RR inference using f16 cooperative matrices:
- Reproduce FP8 conversions, accumulation and camera reprojection arithmetic.
- Widen model weights and avoid requiring VK_EXT_shader_float8.
- Extend model building, replay tools and descriptor metadata.

Expand motion preprocessing and experimental AW2 native-motion support:
- Add tiled LDS dilation, padded allocation handling and thin-only sky fill.
- Order dilation with input waits and NGX on the selected stream.
- Add jitter-aligned native composition, hybrid routing and wire history repair.
- Add prepared masks, sparse repair and independent motion/repair controls.

Add optional fused R11G11B10 input/output conversion, sampled stage timings
and profile summarization. Extend configuration, packaging, documentation,
FidelityFX headers and CPU/GPU regression coverage.

tests/test_accuracy.py

@@ -174,6 +174,17 @@ int main(int argc, char** argv) {
                          self.config("[Interop]\nMotionVectorDilation = 2\n",
                                      {"D4R_MOTION_DILATION": "0"}).stdout)
 
+    def test_thin_sky_opt_in_and_environment_precedence(self):
+        for value, expected in (("false","0"),("true","1"),("auto","0")):
+            self.assertIn(f"export D4R_MOTION_THIN_SKY={expected}",
+                          self.config(f"[Interop]\nMotionDilationThinSky = {value}\n").stdout)
+        self.config("[Interop]\nMotionDilationThinSky = maybe\n", expected=2)
+        self.assertNotIn("export D4R_MOTION_THIN_SKY",
+                         self.config("[Interop]\nMotionDilationThinSky = true\n",
+                                     {"D4R_MOTION_THIN_SKY":"0"}).stdout)
+        for file in ("config/d4r.ini.default", "packaging/d4r.ini"):
+            self.assertRegex((ROOT/file).read_text(), r"(?m)^MotionDilationThinSky\s*=\s*false$")
+
     def test_shipped_configs_default_off(self):
         for file in ("config/d4r.ini.default", "packaging/d4r.ini"):
             self.assertRegex((ROOT / file).read_text(), r"(?m)^PreferAccuracy\s*=\s*false$")