added a tick-tac-toe game using js

[Yashop181]

I've added a Tic-Tac-Toe game to the project, designed for a player vs. computer experience. The game is implemented using HTML, CSS, and JavaScript. It features a simple interface where the player can take turns with the computer to place their marks (X or O) on a 3x3 grid, aiming to get three in a row either horizontally, vertically, or diagonally.