Added Savings Calculator

[krishan-07]

Fixes Issue🛠️

Closes #688

Description👨‍💻

Added savings calculator.
This calculator estimates the total amount you can save over a specified period by making monthly deposits into your bank savings account at a fixed interest rate.

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✅

Tested locally

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 @krishan-07, 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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[Rakesh9100]

It is not looking good that the result is shown after scrolling down. You can do like to float the details input box to the left and the result box to the right on the same page @krishan-07

[krishan-07]

Okay, I'll work on it