Added N sided polygon calculation in 2D Shapes Calculator

[Yuvraj960]

Fixes Issue🛠️

Closes #591

Description👨‍💻

Added the option for user to calculate the area and perimeter for any N-Sided regular polygon shape. He can just enter number of sides and length of a side to get the output.

Type of change📄

• New feature (N-sided polygon option added)

How this has been tested✅

• Performed the calculations for basic 3,45 sided regular shapes and compared it with results of this calculator.
• Compared the results with a very high accuracy, verified website which does the same calculations of calculating the area and perimeter of n-sided regular shapes.

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 am an Open Source Contributor

Screenshots/GIF📷

[github-actions]

Hey @Yuvraj960, 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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[Yuvraj960]

@Rakesh9100, Please review my PR and assign me two more issues at once.
One is Time Until next birthday calculator and second one is palindrome calculator.
I will make their PRs in a day or two, as very less work to be done for them.

[Rakesh9100]

Merged 🎉 @Yuvraj960