asset_url()
Twig function of the framework; its result is escaped like any value.
The URL of a static asset of the theme or plugin, for a link, a video or any other file. The URL carries
?ver= with a hash of the file's content (for a file of an override or of @child/, its modification time),
so browsers load a changed file anew. The result is text, escaped by Twig like any value. An unknown or
invalid name is an error.
Returns string