Added the Contributing.md file

[nirban256]

This will fix the issue no - #50

I have added the Contrbuting.md file and added the necessary steps. Feel free to check the code and let me know if any changes are required to be made.

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Name	Status	Preview	Comments	Updated (UTC)
smart-grid	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 13, 2024 7:05am

[nirban256]

@Mayank2808sharma please review the changes and add the pull request

[Mayank2808sharma]

lgtm