Added Dora Calculator

[Tamilkumaran17]

Fixes Issue🛠️

Closes #868

Description👨‍💻

It's a simple calculator that gets the distance from Dora(x,y) to Object(x,y) along with maximum visible distance value and calculate the output and display.

Type of change📄

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

How this has been tested✅

I verified the changes by conducting functional tests to ensure the calculator accurately computes distances and handles valid/invalid inputs.

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 @Tamilkumaran17, 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]

Also add your calculator in main index.html file to display it on the website, make the commits in this same PR @Tamilkumaran17

[Tamilkumaran17]

index.html updated

[Rakesh9100]

Congrats on getting your PR merged to the repo under GSSOC 2k24 🥳 @Tamilkumaran17