Deprecate Value struct

[LazaroHurtado]

Tensors are n-dimensional arrays, where n ≥ 0. Since 0 is within this range then a tensor has the ability to act as a scalar. This is shown in popular deep learning frameworks like Pytorch and Tensorflow. Therefore, we should mimic this behavior and begin removing any mentions of Value and transferring all of its functionality into Tensor which will become a struct instead of what it is now, a type alias. The reasoning behind having Tensor as a struct is to implement the necessary fields required for backward and forward pass.

This is a developing discussion.