Add segment tree data structure in C++

[ManasUniyal]

@larissalages can you assign me to the task of adding segment tree data structure, it's explanation and some of it's code like -

• Range sum
• Maximum element in a range with it's frequency
• Inversion count using segment tree
• Binary search on tree to find the element greater than K elements
• Range update (Lazy propagation)

I would even like to create a README.md file explaining a bit about segment trees.

[larissalages]

Sure! Thanks @ManasUniyal !