Changeset 57563 for trunk/src/wp-includes/interactivity-api/class-wp-interactivity-api-directives-processor.php

Interactivity API: Integrate Server Directive Processing

The Interactivity API enables WordPress developers to create dynamic and interactive web experiences with ease using a set of special HTML attributes called directives. Please refer to the [Interactivity API proposal](​https://make.wordpress.org/core/2023/03/30/proposal-the-interactivity-api-a-better-developer-experience-in-building-interactive-blocks/) for further details.

It syncs the changes from the Gutenberg plugin: ​https://github.com/WordPress/gutenberg/pull/58066.

Fixes #60356.
Props luisherranz, jonsurrell, swissspidy, westonruter, gziolo.