Added C language demo to the 'reading-and-writing-graphics' example

[arjitGeo]

Firstly, I would like to tell you that this wasm-by-example project really helped me in solidifying my knowledge of WebAssembly.

In an effort to contribute back to this project, I’ve added a example for the C language in the ‘reading-and-writing-graphics’ section.

In this example, I’ve tried to keep the index.js file consistent with the one in the AssemblyScript example. While there might be room for simplification and improvement, I believe maintaining consistency across examples would be better.

Also the booleans to check if the current square is dark or light can be brought down this single condition (x % 2 == y % 2). I didn't do that in order to stay consistent.

Please note that this example does not use Emscripten.

I hope this contribution is useful. If it is, I’d be more than happy to continue doing more contributions.

[netlify]

✅ Deploy Preview for wasmbyexample ready!

Name	Link
🔨 Latest commit	64e39b8
🔍 Latest deploy log	https://app.netlify.com/sites/wasmbyexample/deploys/65fad9ac573b04000860e83b
😎 Deploy Preview	https://deploy-preview-171--wasmbyexample.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.