Added Bitshift Operator

Context

See : aidge_quantization#35 (closed)

include/aidge/backend/cpu/operator/BitShiftImpl_forward_kernels.hpp

@@ -46,6 +46,7 @@ void BitShiftImpl_cpu_forward_kernel(
         std::size_t idx1 = getFlattenedIndex(input1Dims, indexes);
         std::size_t idx2 = getFlattenedIndex(input2Dims, indexes);
         if(direction == BitShift_Op::BitShiftDirection::right)
+
         {
                 output[oIndex]= input_1[idx1] >> input_2[idx2];
         }