Add C++ backend for all the trees present in `binary_trees.py`

[czgdp1807]

Description of the problem

https://github.com/codezonediitj/pydatastructs/blob/main/pydatastructs/trees/binary_trees.py

Follow the pattern of C++ backend in linear_data_structures module.

Check https://github.com/codezonediitj/pydatastructs/tree/main/pydatastructs/linear_data_structures/_backend/cpp

Example of the problem

References/Other comments

[czgdp1807]

@Kishan-Ved Go ahead and take this up.

[Kishan-Ved]

Sure, I'll start working on this. Thank you!

[Kishan-Ved]

I've spent the day reading and understanding backend implementation of search algorithms. However, I'm finding it difficult to understand how to start the implementation from scratch, which files to include and which already defined utils to use.
Can you please commit some starting code, which has files created with necessary imports and the BinaryTree class' backend implemented in c++. (it is a small code defined in binary_trees.py). Also please let me know if nodes are already defined in c++ backend.
This will help me understand and reuse the code to implement other classes.

[czgdp1807]

I won’t be able to do that. Try checking how OneDimensionalArray is implemented. Follow the same pattern here.

[Kishan-Ved]

Please check this once: #551