Simplifies code contributions + reviews and automates the dev setup

[nisarhassan12]

Hi! there, 🙂

this PR simplifies code contributions by fully automating the setup with Gitpod (A free online VS Code like IDE) for contributing.

With a single click, it'll launch a workspace and automatically:

• clone the javascript-algorithms repo.
• install the dependencies.

You can give it a try on my fork of the repo: https://gitpod.io/#https://github.com/nisarhassan12/javascript-algorithms

It seems to work well! Please let me know if there is anything that can be improved. I would love to help :)

[codecov]

Codecov Report

Merging #416 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master   #416   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files         149    149           
  Lines        2612   2612           
  Branches      434    434           
=====================================
  Hits         2612   2612

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[nisarhassan12]

Rebased on top of latest master.