[Suggestion]: Improve code in Tic-Tac-Toe demo

Summary

I believe there's a good scope to improve the code in the Tic-Tac-Toe example here.

Page

https://react.dev/learn/tutorial-tic-tac-toe

Details

• The Board component returns the Square component statically. This could instead be returned dynamically using the map method. This will also be a good way to demonstrate the key prop.
• Talking about the styling, instead of defining a board-row class that puts each box in a row, we can instead use a grid container with 3 columns and fit-content width.
• Instead of attaching a click listener to each box, the click event handling can be delegated to the parent container.

打开 https://react.dev/learn/tutorial-tic-tac-toe 中的 Tic-Tac-Toe 教程，并查看 Board、Square 和 styling 示例。更新演示，使其使用 map 生成方格并演示 key，使用三列网格，并将点击委托给父容器；教程应继续保持易于理解且功能正常。