DOCS: Add a Contributing.md file

[Anubhavdevv]

Want to add Contribution.md file
Kindly assign this issue to me!!

[ohbus]

@anubhav201241 this should basically be the whole contributiong.md file.

You may make changes as necessary.

Thanks for picking up this issue.

[AnshSinghSonkhia]

Hi @ohbus,
I have added the required Contributing.md file with pull request #31
Kindly review it!!

Thanks for your precious time!