Added Sound Level Calculator

[1911aditi]

Fixes Issue🛠️

Closes #1302

Description👨‍💻

A sound level calculator involves designing a simple web interface where users can input sound levels in decibels (dB) and get the combined sound level as the output.

Type of Change📄

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

Checklist✅

• [x] I am an Open Source contributor
• [x] I have performed a self-review of my code
• [x] My code follows the style guidelines of this project

Screenshots/GIF📷

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[Rakesh9100]

Pls work on these by making the new commits in this same PR @1911aditi

1. Rename your folder to Sound-Level-Calculator and make the necessary changes.
2. Add a proper Readme file of your calculator as I can see it is empty.
3. Add your calculator part in the main index.html file to display it on the website.

[1911aditi]

can you check now please? @Rakesh9100

[Rakesh9100]

Separate your CSS to style.css and script to script.js file, respectively.

And also, check the point 3 of previous comment and work accordingly @1911aditi

[1911aditi]

can you check now please? @Rakesh9100

[github-actions[bot]]

Congrats, Your pull request has been successfully merged 🥳🎉 Thank you for your contribution to my project 🚀 Keep Contributing!! ✨ @1911aditi