Added GDP Calculator

[AnandK-pm]

Fixes Issue🛠️

Closes #1117

Description👨‍💻

• Added GDP calculator which uses the Expenditure approach for calculating GDP.

Type of change📄

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

How this has been tested✅

Deployed and tested using Vercel.

Checklist✅

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added demonstration in the form of GIF/video file
• I am an Open Source Contributor

Screenshots/GIF📷

[github-actions]

Hey @AnandK-pm, Welcome to the project CalcDiverse! 🎊
Thanks for your contribution! Your effort makes this project better. Keep it up! 🙌
Please wait for the PR to be reviewed. Happy Coding!! ✨

[netlify]

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[AnandK-pm]

Video Preview

[Rakesh9100]

Pls rename your folder to GDP-Calculator, and make the changes accordingly by making the new commits in this same PR!

Also add README.md file for the calculator in your folder.

Do the changes in this same PR, don't close this!! @AnandK-pm

[Rakesh9100]

Rename your folder correctly, C should be capital @AnandK-pm

[AnandK-pm]

Can you please check now ??

[github-actions]

Congrats, Your pull request has been successfully merged 🥳🎉 Thank you for your contribution to my project 🚀 Keep Contributing!! ✨ @AnandK-pm

[AnandK-pm]

Thank You .
Can you please assign me the currently opened issue as well.