Change project structure;

Added new c# binding;

native/header/Algorithm/PathTracing.h

@@ -0,0 +1,15 @@
+#ifndef PATH_TRACING_H
+#define PATH_TRACING_H
+
+#include "Algorithm/RayIntersection.h"
+#include "Material/Material.h"
+#include "Geometry/Triangle.h"
+#include "Rendering/AOV.h"
+#include "Rendering/Scene.h"
+
+// Unified AOV integrator:
+// - If only surface AOVs are requested, executes a single-hit fast path.
+// - If beauty/direct/indirect are requested, runs the full path tracer and buckets contributions.
+void path_trace_aov(const scene_t* scene, ray_t ray, uint32_t sample_index, uint16_t max_depth, aov_flags_t aov_flags, aov_output_t* out);
+
+#endif // PATH_TRACING_H