Demo: check browser compatibility

https://github.com/BucketOSoftware/playshader-one/blob/9ca0063fa30dcecce5c8e3e987f7581f6936cd11/demo/example.js#L44

```javascript

}

async function main() {
    // TODO: check browser compatibility

    document.body.style.backgroundColor = `#${SKY_COLOR.toString(16)}`

    // Start loading resources

```