Added Binary Search algorithm in Python

[RK-0009]

I have added the code for the Binary Search algorithm in Python. This algorithm will keep reducing the range to search for a value by half. The time complexity is O(log n).

Checklist:

• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• New and existing unit tests pass locally with my changes.
• I have added the file in the correct directory