Make PR, contributing.md pages

[rohan472000]

Make a PR template with required checkboxes, also a guidelines for contribution for this repo.
Anything to discuss then feel free to put below in comments.

[avinashkrishna07]

Hii @rohan472000 Can you please assign this to me, as i'm interested and would like to contribute on this project.
Thank you!

[rohan472000]

@avinashkrishna07 go ahead.