Adding Readme.md

[kshitijmishra27]

as you know in cheatsheet repo i added good quality readme file that you are going to merge....similarly i will add good quality readme file in this repo.....allow me to work on this issue

and also add hacktoberfest label in it

@onecompiler-ops

[shubhsardana29]

hello @kshitijmishra27 are you working on it? if not maybe i can