Add settings to enable visual or text editor for TinyMCE

[JoryHogeveen]

Description

This will allow users to optionally disable the visual editor or the quicktags.

Related GitHub issue(s)

Fixes #6176

Changelog text for these changes

PR checklist

• I have tested my own code to confirm it works as I intended.
• My code follows the WordPress Coding Standards.
• My code follows the WordPress Inline Documentation Standards.
• My code includes automated tests for PHP and/or JS (if applicable).

[sc0ttkclark]

To initialize a quicktags-only textarea, you can call:

window.quicktags( { ...wp.editor.getDefaultSettings().quicktags, id: 'the-field-id' } );

However, it does not appear well unless the textarea is wrapped with <div class="wp-editor-container">

[sc0ttkclark]

We'll need to fix #6178 as a prerequisite for this

[sc0ttkclark]

We need to address other areas like in onSetup and the first useEffect perhaps?

[JoryHogeveen]

Can you elaborate?

[sc0ttkclark]

Basically checking enableTinyMCE before calling other tinymce/editor specific functions elsewhere in this file

[sc0ttkclark]

This is close