[Feature] Add Leap Year Calculator

[GnanariddhikaRavikumar]

Description

Adding Leap Year calculator- Leap Year, people says that it comes once in 4 years but there are some exceptional cases, where leap year doesn't occur like in same pattern. For eg: 1896 is a leap year but after 4 years 1900 is not a leap year. So we are adding the calculator which says whether the year entered is leap year or not . I can able to do this so kindly assign me this issue @Rakesh9100

Screenshots

Checklist

• I have checked the existing issues.
• I follow Contributing Guidelines of this project.
• I am a GSSOC'24 contributor.
• I am a IWOC'24 contributor.
• I am a JWOC'24 contributor.
• I am a SWOC'24 contributor.

Code of Conduct

• I agree to follow this project's "Code of Conduct".

[github-actions]

Hey @GnanariddhikaRavikumar, Welcome to the project CalcDiverse! 🎊
Thanks for opening an issue! 🙌 Please wait for the issue to be assigned. Happy Coding!! ✨

[S-i-y-a-g]

please assign me this issue

[Rpokhariya]

Yes, the century years must be divisible by 400 to be a leap year.
@Rakesh9100 Please assign gssoc24 tags to the issue, I would like to resolve the issue.

[Rakesh9100]

Go ahead @GnanariddhikaRavikumar