WEB I18N GAP PROGRESS: Support for extra spacing between Chinese/Japanese and Western text

Safari 18.4 supports text-autospace:ideograph-alpha ideograph-numeric;

This is only a start, since other browsers don't support this CSS yet, and Safari still doesn't support the 'replace' value. However, this is the kind of property that you can apply to all text now, and as browsers improve it will make the text look better.

More details: https://www.w3.org/TR/clreq-gap/#issue401_spacing