Added Electric Vehicle Savings Calculator

[sweta-singh28]

Fixes Issue🛠️

Closes #1723

Description👨‍💻

Added a new calculator that calculates the cost of a gasoline vehicle per/km and a electric vehicle calculator.

Type of Change📄

• New feature (non-breaking change which adds functionality)

Checklist✅

• I am an Open Source contributor
• I have performed a self-review of my code
• My code follows the style guidelines of this project
• I have commented on my code, particularly in hard-to-understand areas

Screenshots/GIF📷

[github-actions]

Hey @sweta-singh28, 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!! ✨

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[sweta-singh28]

@Rakesh9100 sir, done.

[sweta-singh28]

@Rakesh9100 sir, Could you please merge this PR or provide any update on this? Today is the last day for GSSoC contributions.

[Nihal4777]

@Rakesh9100 This PR is reviewed & can be merged.

[Nihal4777]

@sweta-singh28 Just change PR name to Electric Vehicle Savings Calculator added

[sweta-singh28]

@sweta-singh28 Just change PR name to Electric Vehicle Savings Calculator added

@Rakesh9100 and @Nihal4777 sir, done.

[github-actions]

Congrats, Your pull request has been successfully merged 🥳🎉 Thank you for your contribution to my project 🚀 Keep Contributing!! ✨ @sweta-singh28