feat: Add Number Guessing Game project

[shashwat-28410]

This PR adds a new project called "Number Guessing Game" to the repository. This project is a simple web-based game where users
guess a randomly generated number between 1 and 100 within 10 attempts.

Changes Included:

• Added a new directory: /Number-Guessing-Game/
• Included index.html (structure), style.css (styling), and script.js (game logic).
• Updated the main README.md to list this new project in the projects table.

How to Test:

1. Open the index.html file in your browser.
2. Enter a number between 1 and 100 in the input field.
3. Click "Submit Guess".
4. The game will provide feedback ("Too low!" or "Too high!") and track remaining guesses.