Add ES5 React example for beginners (#73)

[riyak145]

Add ES5 React example for beginners (#73)

Added a simple ES5 React example under examples/es5/es5-example.html for beginners.
It uses React.createElement and a plain ES5 function component to render "Hello, React ES5!".
This helps beginners see React without ES6 or JSX.

[meta-cla]

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[github-actions]

Size changes

Details

📦 Next.js Bundle Analysis for react-dev

This analysis was generated by the Next.js Bundle Analysis action. 🤖

This PR introduced no changes to the JavaScript bundle! 🙌

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Thank you for signing our Contributor License Agreement. We can now accept your code for this (and any) Meta Open Source project. Thanks!

[rickhanlonii]

Is this AI generated? The page isn't linked to at all?

I closed the original issue and I don't think we need this anyway.