fix: Reset button, overflow of the projectile, feat: added check for …

[mondalsurojit]

🛠️ Fixes #1637

👨‍💻 Changes proposed and Brief Description

📌 Reset button is fixed. It works in any situation, even if, the body is moving 📌 Overflow of the projectile is tackled 📌 Added a check in the initial velocity and angle inputs, so that no arbitrary value can be entered 📌 Seperated the messy js file into Projectile.js (module) and script.js (main file) 📌 Improved the UI a bit, and made the site responsive, as much as possible

✅ Check List (Check all the applicable boxes)

• [X] My code doesn't break any part of the project
• [X] This PR does not contain plagiarized content.
• [X] My Addition/Changes works properly and matches the overall repo pattern.
• [X] The title of my pull request is a short description of the requested changes.

📄 Note to reviewers

Hope you like this :)

📷 Screenshots

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