creation of contributing file

[Sloth-Panda]

let me know if this needs to be done

[yashkumarverma-assistant]

Thanks @Sloth-Panda, for raising the issue! 🙌
One of our team mates will revert on this soon. ✅

[anushkasinghal11]

Can I take this up? I want to work on this under SWOC'21

[Sloth-Panda]

@YashKumarVerma do you a contributing file, let me know