Please expose registered aspect ratios in the block editor data store

[markhowellsmead]

What problem does this address?

This will allow extenders to use the registered aspect ratios in their own components / blocks. This would be useful as there is no aspect ratio component available.

const getAspectRatios = () => {
    const settings = wp.data.select('core/block-editor').getSettings();
    return settings?.aspectRatios || [];
};

const aspectRatios = useSelect(getAspectRatios, []);