Added Probability Calculator

[NirbhayTiwari15]

Fixes Issue🛠️

Closes #546

Description👨‍💻

This Calculator calculates the probability of different events to occur based on user input.

Type of change📄

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

How this has been tested✅

Tested on my device and it worked properly.

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📷

[netlify]

✅ Deploy Preview for calcdiverse ready!

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[github-actions]

Hey @NirbhayTiwari15, 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!! ✨

[Rakesh9100]

Pls work on these changes and make the commits in this PR only of your changes.

1. Pls edit the PR description as per the PR template.
2. Mention the issue number this PR closes.
3. Include your calculator section in main index.html file as well.
4. Add a Readme of your calculator in your folder @NirbhayTiwari15

[NirbhayTiwari15]

I have commited the changes @Rakesh9100 , please review it.

[Rakesh9100]

1. Add your calculator section in this file.
2. Enhance your calculator UI.
3. Add the screenshot in the Readme file @NirbhayTiwari15

[NirbhayTiwari15]

@Rakesh9100 ,I have completed the changes, please review it.

[Rakesh9100]

Merged, Congrats on getting your PR merged to this repo under SWOC S4 🎉🎉 @NirbhayTiwari15