Create Merge_Sort.py

[Saurabhsaha027]

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Description

Please describe what changes you have made.

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• Added a file(s) named '...' that implements '...'.

• Changed the algorithm for performance/readablity/bugs.

• Added documentation to the algorithm

Related Issue

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Types of changes

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• [ ] Bug fix (change which fixes an issue with the algorithm)

• [x] New Algorithm (non-breaking change which adds functionality)

• [ ] Documentation

Checklist:

Go over all the following points, and put an x in all the boxes that apply.

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• [x] My code follows the code style of this project.

• [ ] My change requires a change to the documentation.

• [ ] I have updated the documentation accordingly.

• [ ] I have read the CONTRIBUTING document.