Assembler - Block renderer - Targeting of theme.json styles to a pattern

[miksansegundo]

What

A classname in the pattern container is required to apply theme.json styles to a pattern. Not sure how that feature works and if we support it in the assembler. Let's check it and add it if missing.

Why

The slug is added to the wrapper in the editor and the frontend currently in order to allow the targeting of theme.json styles to a pattern.

How

• Learn how to use the feature. See my comment

[taipeicoder]

Closing due to the issue being stale, and no current plans to take further action on it.