Added Google Scholar

[sp1thas]

---

name: Engine Implementation
about: Implemented a new engine
title: 'Google Scholar Search Engine'
labels: 'engine', 'needs-review'
assignees: '@deven96', '@MeNsaaH'

---

Summary of steps Taken to implement the engine
A clear and concise description of what the engine is.

Ex. I added the Google Scholar engine, `googlescholar.py` to the `search_engine_parser/core/engines` directory and made the necessary imports.
This engine integrates Google Scholar search capabilities and returns titles, descriptions, links, files links, and results types

[deven96]

Please resolve the conflicts, as @PalAditya changed the supported_engines.md with PR #51

[deven96]

@all-contributors add @sp1thas for code and test

[allcontributors]

@deven96

I've put up a pull request to add @sp1thas! 🎉