Lenet operators

Added backend_cuda for the following operators:

• AvgPooling
• FC/Gemm
• MaxPooling
• ReLU

include/aidge/backend/cuda/operator/FCImpl.hpp

@@ -29,7 +29,7 @@
 namespace Aidge {
 class FCImplForward_cuda : public Registrable<FCImplForward_cuda,
                                                  std::tuple<DataType>,
-                                                 void(unsigned int , unsigned int , unsigned int, bool, const void* , const void* , const void* , void*)> {};
+                                                 void(std::size_t , std::size_t, std::size_t, bool, const void* , const void* , const void* , void*)> {};
 class FCImpl_cuda : public OperatorImpl {
 private:
     // CuDNN specific variables
@@ -47,7 +47,7 @@ public:
     // ~FCImpl_cuda();
 
 private:
-    template <class T> void forward_(const Tensor& input0, const Tensor& input1, const Tensor& input2, bool noBias, DimSize_t outChannels);
+    template <class T> void forward_(const Tensor& input0, const Tensor& input1, const Tensor& input2, bool noBias, std::size_t outChannels);
 };
 
 namespace {