Add CONTRIBUTING.md

[boradesanket13]

• Add general good practices while starting to work with this specific project.
• Add standard Github workflow commands in the CONTRIBUTING.md (opening issues, get assigned, fork, create clone, add, commit, creating PRs).
• It provides new potential project contributors with a short guide to how they can help with your project.

[boradesanket13]

Kindly assign me this issue. I would like to work on it.🚀

[nitisht]

Sure @Sanket1308

[nitisht]

any news on this one @boradesanket13

[boradesanket13]

Working on it. Will be completed within 24 hours🚀