Implementation of Tree Sort

[mdrpanwar]

Is your feature request related to a problem? Please describe.
I would like to add a sorting algorithm called Tree Sort under /Sorts. It is a sorting technique that constructs a binary search tree using the given data and then outputs the elements by inorder traversal of the tree.

Describe the solution you'd like
I would be using the implementations of BST and Inorder Traversal from this repository itself, keeping the code modular.

Additional context
Here is the link to the Wikipedia page of Tree Sort.

I would like to work on this implementation as part of Hacktoberfest 2021.
@siriak Could you please assign this issue to me?

Thanks.