[Doc] Make Contributors Guideline

[KamalDGRT]

Documentation :rocket:

Objective :pushpin:

Create Contributors Guideline to help new Contributors get started with this Project.

Features to be added / modified :ballot_box_with_check:

• Add a CONTRIBUTING.md to allow new users to get started with knowing how to contribute.
• Add Screenshots wherever possible.
• Add the basic information about creating Issues, Pull Requests and Branching.
• Mention tutorials related to Git and GitHub to help them better understand.