Adding Contribution guidelines

[garimasingh128]

• Add code of conduct
  Reference: https://gist.github.com/garimasingh128/65fd0872d1746ab4f73a5c5dbce72829
  https://gist.github.com/garimasingh128/29047f25749c8cb913f1af34077b0d8b
• Contribution guidelines
  Reference: https://gist.github.com/garimasingh128/11e2449ce355c94543764531a43dd920

[Pranav016]

I would like to work on this issue.

[harshitkathuria]

Hello, this is my first time contributing to an open source project. I would like to work on this issue

[Pranav016]

Sorry @harshitkathuria , I have already started working on this issue. You can make a contribution to any of my repositories to gain some experience if this is your first time. Otherwise let me know how else can I help you :)

[harshitkathuria]

Sorry @Pranav016, please continue working on this issue.. Let me see if I can try to fix any other issue :)

[Chaitanya31612]

Can I work on this @garimasingh128?

[garimasingh128]

@Pranav016 he is already working on this

[Chaitanya31612]

Okay, I was just asking. No problem.