Is it possible to add an additional text input before the Blocks editor? I'm trying to update my Subtitle plugin to be Gutenberg compatible, but the subtitle isn't really a "Block" and I think it's more similar to the page title.
Pre-WordPress 5.0, I used the
edit_form_after_title hook, but in Gutenberg that's irrelevant, so I'm wondering how to inject a new, non-block, element?
Plugin in question: KIA Subtitle