Implement backend factory

include/cudanet.hpp

@@ -0,0 +1,55 @@
+#pragma once
+
+// ============================================================================
+// Core Data Structures & Abstractions (BACKEND-INDEPENDENT)
+// ============================================================================
+
+#include "shape.hpp"
+#include "backend.hpp"
+#include "tensor.hpp"
+#include "layer.hpp"
+
+// ============================================================================
+// Container Classes
+// ============================================================================
+
+#include "module.hpp"
+#include "model.hpp"
+
+// ============================================================================
+// Layer Implementations
+// ============================================================================
+
+// Activation
+#include "layers/activation.hpp"
+
+// Normalization
+#include "layers/batch_norm.hpp"
+
+// Linear
+#include "layers/dense.hpp"
+
+// Convolutional
+#include "layers/conv2d.hpp"
+
+// Pooling
+#include "layers/max_pool.hpp"
+#include "layers/avg_pool.hpp"
+
+// Composition (element-wise operations)
+#include "layers/add.hpp"
+#include "layers/concat.hpp"
+
+// ============================================================================
+// Dataset Labels
+// ============================================================================
+
+#include "datasets/imagenet.hpp"
+
+// ============================================================================
+// Backend-Specific Includes (conditionally compiled)
+// ============================================================================
+
+#ifdef USE_CUDA
+#include "backend/cuda/all.cuh"
+#endif